{ "meta": { "api_version": "v1", "attribution": "lithium-niobate.com data compiled by Wentao Jiang; cite the original sources listed per value.", "count": 143, "data_version": "0.1.0", "documentation": "https://lithium-niobate.com/api/openapi.json", "license": { "id": "CC-BY-4.0", "name": "Creative Commons Attribution 4.0 International", "url": "https://creativecommons.org/licenses/by/4.0/" }, "note": "Public scalar records (status U excluded; see unverified.json)." }, "records": [ { "category": "optical", "conditions": { "method": "o and e polarization, 390-3800 nm" }, "default": true, "id": "absorption-coefficient/cln/leidinger2015", "kind": "scalar", "max": 2, "min": 0.0001, "name": "Absorption coefficient in the transparent range", "notes": "Range over 390-3800 nm ('< 1.0e-4 to 2 cm^-1'); the value at 1550 nm is in the paper and was not read. 1.0e-4 cm^-1 = 0.043 dB/m.", "property": "absorption-coefficient", "provenance": { "locator": "abstract", "source_id": "leidinger2015", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha", "unit": { "display": "cm^-1", "ucum": "/cm" }, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "birefringence/cln/zelmon1997-1064nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e minus zelmon1997-cln-o at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0766, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "birefringence/cln/zelmon1997-1550nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e minus zelmon1997-cln-o at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0736, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "birefringence/cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e minus zelmon1997-cln-o at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0842, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "birefringence/mgo5-cln/zelmon1997-1064nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e minus zelmon1997-mgo5-o at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0815, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "birefringence/mgo5-cln/zelmon1997-1550nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e minus zelmon1997-mgo5-o at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0782, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "birefringence/mgo5-cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Birefringence n_e - n_o", "notes": "Negative: LiNbO3 is negative uniaxial (n_e < n_o).", "property": "birefringence", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e minus zelmon1997-mgo5-o at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e - n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": -0.0897, "variant": "mgo5-cln" }, { "category": "acoustic", "conditions": { "method": "plane-wave ultrasonic, (110) plate" }, "default": true, "id": "bulk-velocity-longitudinal-x/cln/kushibiki1999", "kind": "scalar", "name": "Bulk longitudinal velocity along X", "property": "bulk-velocity-longitudinal-x", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_L,X", "uncertainty": { "type": "stated", "value": 0.3 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 6544.53, "variant": "cln" }, { "category": "acoustic", "conditions": { "method": "plane-wave ultrasonic, (300) plate" }, "default": true, "id": "bulk-velocity-longitudinal-y/cln/kushibiki1999", "kind": "scalar", "name": "Bulk longitudinal velocity along Y", "property": "bulk-velocity-longitudinal-y", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_L,Y", "uncertainty": { "type": "stated", "value": 0.26 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 6806.55, "variant": "cln" }, { "category": "acoustic", "conditions": { "method": "plane-wave ultrasonic, (006) plate" }, "default": true, "id": "bulk-velocity-longitudinal-z/cln/kushibiki1999", "kind": "scalar", "name": "Bulk longitudinal velocity along Z", "notes": "Reproduced to 0.4 m/s by the piezo-stiffened velocity from the kushibiki1999 constants (consistency check in the tensor records).", "property": "bulk-velocity-longitudinal-z", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_L,Z", "uncertainty": { "type": "stated", "value": 0.32 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 7328.2, "variant": "cln", "variant_note": "SAW-grade congruent" }, { "category": "acoustic", "conditions": { "method": "resonance, (110) plate" }, "default": true, "id": "bulk-velocity-shear-x/cln/kushibiki1999", "kind": "scalar", "name": "Bulk shear velocity along X (resonance)", "property": "bulk-velocity-shear-x", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_S,X", "uncertainty": { "type": "stated", "value": 0.59 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 4750.67, "variant": "cln" }, { "category": "acoustic", "conditions": { "method": "plane-wave ultrasonic, (300) plate" }, "default": true, "id": "bulk-velocity-shear-y/cln/kushibiki1999", "kind": "scalar", "name": "Bulk shear velocity along Y", "property": "bulk-velocity-shear-y", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_S,Y", "uncertainty": { "type": "stated", "value": 0.21 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 3940.49, "variant": "cln" }, { "category": "acoustic", "conditions": { "method": "plane-wave ultrasonic, (006) plate" }, "default": true, "id": "bulk-velocity-shear-z/cln/kushibiki1999", "kind": "scalar", "name": "Bulk shear velocity along Z", "property": "bulk-velocity-shear-z", "provenance": { "locator": "Table II", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "v_S,Z", "uncertainty": { "type": "stated", "value": 0.23 }, "unit": { "display": "m/s", "ucum": "m/s" }, "value": 3590.41, "variant": "cln" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "id": "coercive-field-ratio-cln-sln/cln/gopalan1998", "kind": "scalar", "max": 5, "min": 4, "name": "Coercive field ratio E_c(CLN)/E_c(SLN)", "property": "coercive-field-ratio-cln-sln", "provenance": { "locator": "abstract", "source_id": "gopalan1998", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "uncertainty": { "type": "approximate" }, "unit": { "display": "-", "ucum": "1" }, "variant": "cln", "variant_note": "CLN (C = 0.484) vs near-SLN (C = 0.498)" }, { "category": "ferroelectric", "id": "coercive-field-ratio-cln-sln/cln/volk2008", "kind": "scalar", "max": 3.5, "min": 3.2, "name": "Coercive field ratio E_c(CLN)/E_c(SLN)", "notes": "Differs from gopalan1998 (4-5); the sources measured different crystals.", "property": "coercive-field-ratio-cln-sln", "provenance": { "derivation": "ratio of the volk2008 Table 7.1 CLN and SLN values; p. 184 states a factor of three (ref. Chen et al. 2001)", "locator": "Table 7.1, p. 185; p. 184 ('factor of three', ref. Chen et al. 2001)", "source_id": "volk2008", "status": "C", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "-", "ucum": "1" }, "variant": "cln" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "coercive-field/cln/volk2008", "kind": "scalar", "name": "Coercive field", "property": "coercive-field", "provenance": { "locator": "Table 7.1, p. 185 (210 kV/cm, literature average); p. 118 (210-220 kV/cm)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_c", "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "value": 21, "variant": "cln" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "coercive-field/mgo1-sln/volk2008", "kind": "scalar", "name": "Coercive field", "property": "coercive-field", "provenance": { "locator": "Table 7.1, p. 185 (25 kV/cm)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_c", "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "value": 2.5, "variant": "mgo1-sln" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "coercive-field/mgo5-cln/volk2008", "kind": "scalar", "max": 6.8, "min": 6.0, "name": "Coercive field", "notes": "Individual reports in the text (p. 184): switching at 4.45 kV/mm (0.5 mm wafer, Kuroda et al.); poling with 2.5 kV/mm pulses (4.8% MgO, 0.3 mm, Mizuuchi et al.).", "property": "coercive-field", "provenance": { "locator": "Table 7.1, p. 185 (60-68 kV/cm, table average)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_c", "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "variant": "mgo5-cln" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "coercive-field/sln/volk2008", "kind": "scalar", "max": 6.5, "min": 6.0, "name": "Coercive field", "notes": "Conflicts within volk2008: p. 118 gives about 21-25 kV/cm (2.1-2.5 kV/mm) for near-stoichiometric crystals, citing gopalan1998.", "property": "coercive-field", "provenance": { "locator": "Table 7.1, p. 185 (60-65 kV/cm)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_c", "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "variant": "sln" }, { "category": "structure", "id": "congruent-composition/cln/cti1999", "kind": "scalar", "name": "Congruent composition", "property": "congruent-composition", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "uncertainty": { "type": "stated", "value": 0.01 }, "unit": { "display": "mol% Li2O", "ucum": "%" }, "value": 48.38, "variant": "cln" }, { "category": "structure", "default": true, "id": "congruent-composition/cln/volk2008", "kind": "scalar", "name": "Congruent composition", "notes": "volk2008 also gives [Li]/[Nb] = 0.94 (p. 9) and R = 0.4845 (p. 5); its UV-edge formula uses 48.38 mol% (p. 142).", "property": "congruent-composition", "provenance": { "locator": "pp. 4-5, 9", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "mol% Li2O", "ucum": "%" }, "value": 48.45, "variant": "cln" }, { "category": "ferroelectric", "id": "curie-temperature-vs-composition/unspecified/volk2008-bordui1992", "kind": "scalar", "name": "Curie temperature vs crystal composition (linear fit)", "notes": "Gives 1143.2 / 1145.9 / 1206.5 C at 48.38 / 48.45 / 50.0 mol% (computed).", "property": "curie-temperature-vs-composition", "provenance": { "locator": "Eq. (6.3), p. 140", "original_reference": "Bordui et al., J. Appl. Phys. 71, 875 (1992)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "C", "ucum": "Cel" }, "value_text": "T_C = 39.064 c - 746.73 (T_C in C, c in mol% Li2O)", "variant": "unspecified" }, { "category": "ferroelectric", "conditions": { "method": "DTA / dielectric" }, "default": true, "id": "curie-temperature-vs-composition/unspecified/volk2008-iyi1992", "kind": "scalar", "name": "Curie temperature vs crystal composition (linear fit)", "notes": "Gives 1138.7 / 1141.5 / 1202.3 C at 48.38 / 48.45 / 50.0 mol% (computed).", "property": "curie-temperature-vs-composition", "provenance": { "locator": "Eq. (6.2), p. 140", "original_reference": "Iyi et al., J. Solid State Chem. 101, 340 (1992)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "C", "ucum": "Cel" }, "value_text": "T_C = 39.26 c - 760.67 (T_C in C, c in mol% Li2O)", "variant": "unspecified" }, { "category": "ferroelectric", "id": "curie-temperature/cln/cti1999", "kind": "scalar", "name": "Curie temperature", "notes": "Agrees within 1 C with the Bordui composition fit at 48.38 mol% (1143.2 C, computed ).", "property": "curie-temperature", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "uncertainty": { "type": "stated", "value": 0.7 }, "unit": { "display": "C", "ucum": "Cel" }, "value": 1142.3, "variant": "cln", "variant_note": "48.38 mol% Li2O" }, { "category": "ferroelectric", "default": true, "id": "curie-temperature/cln/volk2008", "kind": "scalar", "name": "Curie temperature", "property": "curie-temperature", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nikogosyan 2005", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "unit": { "display": "C", "ucum": "Cel" }, "value": 1140, "variant": "cln" }, { "category": "ferroelectric", "default": true, "id": "curie-temperature/sln/volk2008", "kind": "scalar", "name": "Curie temperature", "property": "curie-temperature", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Chen et al., Opt. Commun. 188, 359 (2001)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "unit": { "display": "C", "ucum": "Cel" }, "value": 1206, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "ferroelectric", "id": "curie-temperature/sln/wong2002", "kind": "scalar", "name": "Curie temperature", "notes": "Quoted from wong2002 by a secondary web page (de.wikipedia); wong2002 not read. Lies 7 C above volk2008 and above both composition fits at 50.0 mol% (1202.3 and 1206.5 C).", "property": "curie-temperature", "provenance": { "source_id": "wong2002", "status": "S", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "unit": { "display": "C", "ucum": "Cel" }, "value": 1213, "variant": "sln" }, { "category": "ferroelectric", "conditions": { "method": "neutron powder diffraction" }, "id": "curie-temperature/unspecified/boysen1994", "kind": "scalar", "name": "Curie temperature", "notes": "Abstract gives 'about 1430 K' (about 1157 C); composition not seen.", "property": "curie-temperature", "provenance": { "source_id": "boysen1994", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "uncertainty": { "type": "approximate" }, "unit": { "display": "K", "ucum": "K" }, "value": 1430, "variant": "unspecified" }, { "category": "ferroelectric", "id": "curie-temperature/unspecified/weis1985", "kind": "scalar", "name": "Curie temperature", "notes": "weis1985 p. 192 text says 'below 1210 C' without a reference.", "property": "curie-temperature", "provenance": { "locator": "Table 1, p. 197", "original_reference": "Warner, Onoe, Coquin, JASA 42, 1223 (1967)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_C", "unit": { "display": "C", "ucum": "Cel" }, "value": 1165, "variant": "unspecified", "variant_note": "Warner et al. 1967 sample" }, { "category": "electrical", "conditions": { "temperature_text": "200-1000 C" }, "default": true, "id": "dark-conductivity-activation-energy/cln/volk2008", "kind": "scalar", "name": "Activation energy of dark (protonic) conductivity", "property": "dark-conductivity-activation-energy", "provenance": { "locator": "Sec. 3.2.1, pp. 59-60", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "uncertainty": { "type": "approximate" }, "unit": { "display": "eV", "ucum": "eV" }, "value": 1.1, "variant": "cln" }, { "category": "electrical", "conditions": { "temperature_text": "room temperature, extrapolated from high temperature" }, "default": true, "id": "dark-conductivity/cln/volk2008", "kind": "scalar", "max": 1e-14, "min": 1e-16, "name": "Dark conductivity", "notes": "Protonic conduction; activation energy about 1.1 eV (200-1000 C). 8-10 orders of magnitude below the 1.0e-6 S/m floor fitted in bouchy2022.", "property": "dark-conductivity", "provenance": { "locator": "Sec. 3.2.1, pp. 59-60 (1e-16 to 1.0e-18 Ohm^-1 cm^-1)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "sigma_d", "unit": { "display": "S/m", "ucum": "S/m" }, "variant": "cln", "variant_note": "undoped or slightly doped CLN" }, { "category": "structure", "id": "density/cln/cti1999", "kind": "scalar", "name": "Density", "property": "density", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4650, "variant": "cln" }, { "category": "structure", "conditions": { "method": "Archimedes" }, "default": true, "id": "density/cln/kushibiki1999", "kind": "scalar", "name": "Density", "property": "density", "provenance": { "locator": "Table IV", "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "uncertainty": { "type": "stated", "value": 0.2 }, "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4642.8, "variant": "cln", "variant_note": "SAW-grade congruent" }, { "category": "structure", "id": "density/cln/volk2008", "kind": "scalar", "name": "Density", "notes": "Unit misprinted 'g cm^-1' in the source table.", "property": "density", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Takanaga, Hirohashi, Kushibiki, Jpn. J. Appl. Phys. 38, 3201 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4647, "variant": "cln" }, { "category": "structure", "default": true, "id": "density/sln/volk2008", "kind": "scalar", "name": "Density", "notes": "SLN is lighter than CLN in the same compilation (4635 vs 4647 kg/m^3).", "property": "density", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Takanaga, Hirohashi, Kushibiki, Jpn. J. Appl. Phys. 38, 3201 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4635, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "structure", "conditions": { "temperature_C": 30 }, "id": "density/unspecified/ogi2002", "kind": "scalar", "name": "Density", "notes": "ogi2002 also quotes a handbook value of 4633 kg/m^3.", "property": "density", "provenance": { "source_id": "ogi2002", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4636, "variant": "unspecified" }, { "category": "structure", "id": "density/unspecified/weis1985", "kind": "scalar", "name": "Density", "notes": "Used in a cell-volume calculation without a measurement reference; weis1985 p. 201 uses 4.7e3 kg/m^3 in acousto-optic figures of merit.", "property": "density", "provenance": { "locator": "p. 194", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "rho", "unit": { "display": "kg/m^3", "qudt": "http://qudt.org/vocab/unit/KiloGM-PER-M3", "ucum": "kg/m3" }, "value": 4628, "variant": "unspecified" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 1064 }, "id": "dne-dt/cln/jundt1997-1064nm", "kind": "scalar", "name": "Thermo-optic coefficient, extraordinary", "property": "dne-dt", "provenance": { "derivation": "derivative of the Jundt 1997 n_e(T) Sellmeier at 25 C; coefficients status S (via a secondary source)", "source_id": "jundt1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_e/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 4.01e-05, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 1550 }, "default": true, "id": "dne-dt/cln/jundt1997-1550nm", "kind": "scalar", "name": "Thermo-optic coefficient, extraordinary", "property": "dne-dt", "provenance": { "derivation": "derivative of the Jundt 1997 n_e(T) Sellmeier at 25 C; coefficients status S (via a secondary source)", "source_id": "jundt1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_e/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 3.75e-05, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 633 }, "id": "dne-dt/cln/jundt1997-633nm", "kind": "scalar", "name": "Thermo-optic coefficient, extraordinary", "property": "dne-dt", "provenance": { "derivation": "derivative of the Jundt 1997 n_e(T) Sellmeier at 25 C; coefficients status S (via a secondary source)", "source_id": "jundt1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_e/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 4.89e-05, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": null, "temperature_text": "300 K", "wavelength_nm": 1523 }, "id": "dne-dt/cln/moretti2005-1523nm", "kind": "scalar", "name": "Thermo-optic coefficient, extraordinary", "notes": "Quoted by zhu2021; moretti2005's own table not read.", "property": "dne-dt", "provenance": { "source_id": "moretti2005", "status": "S", "transcribed": "2026-10-25", "via": "zhu2021" }, "public": true, "symbol": "dn_e/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 3.34e-05, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_text": "300 K", "wavelength_nm": 632 }, "id": "dne-dt/cln/moretti2005-632nm-300k", "kind": "scalar", "name": "Thermo-optic coefficient, extraordinary", "notes": "16% below the Jundt-derived value at 633 nm.", "property": "dne-dt", "provenance": { "derivation": "dn_e/dT = (-2.6 + 22.4e-3 T) x 1.0e-5 per K evaluated at T = 300 K (T in K inferred); formula status S", "locator": "schwesyg2011 Eqs. (2.26)-(2.27)", "source_id": "moretti2005", "status": "C", "transcribed": "2026-10-25", "via": "schwesyg2011" }, "public": true, "symbol": "dn_e/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 4.12e-05, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 1064 }, "id": "dno-dt/cln/cti1999-1064nm", "kind": "scalar", "name": "Thermo-optic coefficient, ordinary", "property": "dno-dt", "provenance": { "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C", "source_id": "cti1999", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_o/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 5.4e-06, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 1550 }, "id": "dno-dt/cln/cti1999-1550nm", "kind": "scalar", "name": "Thermo-optic coefficient, ordinary", "property": "dno-dt", "provenance": { "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C", "source_id": "cti1999", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_o/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 4.1e-06, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 633 }, "id": "dno-dt/cln/cti1999-633nm", "kind": "scalar", "name": "Thermo-optic coefficient, ordinary", "property": "dno-dt", "provenance": { "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C", "source_id": "cti1999", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "dn_o/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 9.4e-06, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_text": "300 K", "wavelength_nm": 632 }, "id": "dno-dt/cln/moretti2005-632nm-300k", "kind": "scalar", "name": "Thermo-optic coefficient, ordinary", "notes": "2.5x below the value derived from the cti1999 Sellmeier.", "property": "dno-dt", "provenance": { "derivation": "dn_o/dT = (-1.7 + 6.9e-3 T) x 1.0e-5 per K evaluated at T = 300 K (T in K inferred); formula status S", "locator": "schwesyg2011 Eqs. (2.26)-(2.27)", "source_id": "moretti2005", "status": "C", "transcribed": "2026-10-25", "via": "schwesyg2011" }, "public": true, "symbol": "dn_o/dT", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 3.7e-06, "variant": "cln" }, { "category": "acoustic", "conditions": { "electrical_boundary": "E" }, "default": true, "id": "elastic-c14/lt-saw/kushibiki1999", "kind": "scalar", "name": "Elastic stiffness component c14 (constant E)", "notes": "In the same table and convention LiNbO3 has c14 = +7.83 GPa: the c14 sign differs between LN and LT.", "property": "elastic-c14", "provenance": { "source_id": "kushibiki1999", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "c14^E", "tensor_component": "c14", "unit": { "display": "GPa", "qudt": "http://qudt.org/vocab/unit/GigaPA", "ucum": "GPa" }, "value": -10.75, "variant": "lt-saw" }, { "category": "optical", "conditions": { "mechanical_boundary": "T", "wavelength_nm": 633 }, "default": true, "id": "eo-r13-T/sln/volk2008", "kind": "scalar", "name": "Electro-optic coefficient r13, unclamped", "property": "eo-r13-T", "provenance": { "locator": "Table 1.2, p. 4", "original_reference": "Nikogosyan 2005", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "r13^T", "tensor_component": "r13", "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 10.4, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "conditions": { "mechanical_boundary": "T" }, "id": "eo-r22-T/cln/volk2008-yonekura2007", "kind": "scalar", "name": "Electro-optic coefficient r22, unclamped", "notes": "Labelled 'constant stress (clamped)' in the source, which contradicts itself (constant stress = unclamped, T); the magnitude fits T values. CLN:5%Mg 6.2 and near-SLN:1.8%Mg 6.97 pm/V in the same report.", "property": "eo-r22-T", "provenance": { "locator": "p. 150", "original_reference": "Yonekura et al., Opt. Rev. 14, 194 (2007)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "r22^T", "tensor_component": "r22", "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 6.54, "variant": "cln" }, { "category": "optical", "conditions": { "mechanical_boundary": "T", "wavelength_nm": 633 }, "default": true, "id": "eo-r33-T/sln/volk2008", "kind": "scalar", "name": "Electro-optic coefficient r33, unclamped", "notes": "Partial set (r22 absent), so stored as scalars rather than a tensor.", "property": "eo-r33-T", "provenance": { "locator": "Table 1.2, p. 4", "original_reference": "Nikogosyan 2005", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "r33^T", "tensor_component": "r33", "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 38, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "default": true, "id": "eo-r33/lt-unspecified/wang2025lt", "kind": "scalar", "name": "Electro-optic coefficient r33", "notes": "Clamping condition and wavelength not stated where quoted.", "property": "eo-r33", "provenance": { "locator": "introduction, ref. 29", "original_reference": "Wang et al., Optica 11, 1614 (2024), DOI 10.1364/OPTICA.537730 (wang2024optica)", "source_id": "wang2025lt", "status": "S", "transcribed": "2026-10-25" }, "public": true, "symbol": "r33", "tensor_component": "r33", "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 30.5, "variant": "lt-unspecified", "variant_note": "thin-film LiTaO3 context" }, { "category": "acoustic", "default": true, "id": "hydrostatic-piezo-dh/unspecified/weis1985-graham1976", "kind": "scalar", "name": "Hydrostatic piezoelectric coefficient d_h = 2 d31 + d33", "notes": "Implies d33 of about 8.0-8.4 pC/N with measured d31, favouring the kushibiki1999 set (d33 = 8.7, computed) over 6.0 and ruling out 12.5-16.", "property": "hydrostatic-piezo-dh", "provenance": { "locator": "p. 198", "original_reference": "Graham, Ferroelectrics 10, 65 (1976); confirmed on 9 samples from 5 suppliers, Graham, J. Appl. Phys. 48, 2153 (1977)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "d_h", "uncertainty": { "type": "stated", "value": 0.014 }, "unit": { "display": "pC/N", "ucum": "pC/N" }, "value": 6.31, "variant": "unspecified" }, { "category": "ferroelectric", "default": true, "id": "internal-field/cln/gopalan1998", "kind": "scalar", "name": "Internal field", "notes": "Abstract: the internal field vanishes in SLN.", "property": "internal-field", "provenance": { "locator": "abstract", "source_id": "gopalan1998", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_int", "uncertainty": { "type": "approximate" }, "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "value": 2.5, "variant": "cln" }, { "category": "ferroelectric", "id": "internal-field/cln/volk2008", "kind": "scalar", "name": "Internal field", "property": "internal-field", "provenance": { "locator": "Table 7.1, p. 185", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_int", "unit": { "display": "kV/cm", "ucum": "kV/cm" }, "value_text": "printed '2-33' kV/cm (likely a misprinted range)", "variant": "cln" }, { "category": "ferroelectric", "default": true, "id": "internal-field/mgo5-cln/volk2008", "kind": "scalar", "name": "Internal field", "property": "internal-field", "provenance": { "locator": "Table 7.1, p. 185 (5 kV/cm)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_int", "unit": { "display": "kV/mm", "ucum": "kV/mm" }, "value": 0.5, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "method": "1/e transmission, 1 cm thick" }, "id": "ir-cutoff/cln/cti1999", "kind": "scalar", "name": "IR transmission cutoff", "property": "ir-cutoff", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "nm", "ucum": "nm" }, "value": 4600, "variant": "cln" }, { "category": "structure", "id": "lattice-a/cln/cti1999", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.151, "variant": "cln", "variant_note": "48.38 mol% Li2O" }, { "category": "structure", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "lattice-a/cln/volk2008", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "locator": "Table 1.1, p. 3 (515.0 pm)", "original_reference": "Furukawa et al., Jpn. J. Appl. Phys. 38, 1816 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.15, "variant": "cln" }, { "category": "structure", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "lattice-a/sln/volk2008", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "locator": "Table 1.1, p. 3 (514.7 pm)", "original_reference": "Furukawa et al., Jpn. J. Appl. Phys. 38, 1816 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.147, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "structure", "conditions": { "method": "single-crystal neutron diffraction", "temperature_C": 24 }, "id": "lattice-a/unspecified/cod-abrahams1966-pt4", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "locator": "COD 1541936", "original_reference": "Abrahams, Hamilton, Reddy, J. Phys. Chem. Solids 27, 1013 (1966), part 4, DOI 10.1016/0022-3697(66)90073-4", "source_id": "cod", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.14829, "variant": "unspecified", "variant_note": "1966 crystal, composition not stated" }, { "category": "structure", "id": "lattice-a/unspecified/cod-ohgaki1992", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "locator": "COD 1544665", "source_id": "ohgaki1992", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.1502, "variant": "unspecified" }, { "category": "structure", "conditions": { "method": "synchrotron X-ray diffraction", "temperature_text": "293 K (COD CIF)" }, "default": true, "id": "lattice-a/unspecified/hsu1997", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "notes": "Same value as W. L. Bond quoted in weis1985 p. 193 (P-comp).", "property": "lattice-a", "provenance": { "locator": "COD 2101845", "source_id": "hsu1997", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.148, "variant": "unspecified" }, { "category": "structure", "id": "lattice-a/unspecified/weis1985-from-density", "kind": "scalar", "name": "Lattice constant a (hexagonal setting)", "property": "lattice-a", "provenance": { "derivation": "calculated in the source from c = 13.863 A and rho = 4628 kg/m^3", "locator": "p. 194", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "a", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.15, "variant": "unspecified" }, { "category": "structure", "id": "lattice-c/cln/cti1999", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.866, "variant": "cln", "variant_note": "48.38 mol% Li2O" }, { "category": "structure", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "lattice-c/cln/volk2008", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "locator": "Table 1.1, p. 3 (1386.4 pm)", "original_reference": "Furukawa et al., Jpn. J. Appl. Phys. 38, 1816 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.864, "variant": "cln" }, { "category": "structure", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "lattice-c/sln/volk2008", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "locator": "Table 1.1, p. 3 (1385.6 pm)", "original_reference": "Furukawa et al., Jpn. J. Appl. Phys. 38, 1816 (1999)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.856, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "structure", "conditions": { "method": "single-crystal neutron diffraction", "temperature_C": 24 }, "id": "lattice-c/unspecified/cod-abrahams1966-pt4", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "locator": "COD 1541936", "original_reference": "Abrahams, Hamilton, Reddy, J. Phys. Chem. Solids 27, 1013 (1966), part 4, DOI 10.1016/0022-3697(66)90073-4", "source_id": "cod", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.8631, "variant": "unspecified", "variant_note": "1966 crystal, composition not stated" }, { "category": "structure", "id": "lattice-c/unspecified/cod-ohgaki1992", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "locator": "COD 1544665", "source_id": "ohgaki1992", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.8653, "variant": "unspecified" }, { "category": "structure", "conditions": { "method": "synchrotron X-ray diffraction", "temperature_text": "293 K (COD CIF)" }, "default": true, "id": "lattice-c/unspecified/hsu1997", "kind": "scalar", "name": "Lattice constant c (hexagonal setting)", "property": "lattice-c", "provenance": { "locator": "COD 2101845", "source_id": "hsu1997", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "c", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 13.863, "variant": "unspecified" }, { "category": "electrical", "default": true, "id": "maxwell-relaxation-time/cln/volk2008", "kind": "scalar", "max": 500, "min": 5, "name": "Maxwell relaxation time (dark)", "notes": "Internally inconsistent with volk2008's own sigma_d: tau = eps eps0 / sigma gives 0.3-29 days (eps = 28) or 0.9-86 days (eps = 84) (computed).", "property": "maxwell-relaxation-time", "provenance": { "locator": "p. 159", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "tau_M", "unit": { "display": "days", "ucum": "d" }, "variant": "cln" }, { "category": "ferroelectric", "id": "melting-point/cln/cti1999", "kind": "scalar", "name": "Melting point", "property": "melting-point", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_m", "uncertainty": { "type": "approximate" }, "unit": { "display": "C", "ucum": "Cel" }, "value": 1250, "variant": "cln" }, { "category": "ferroelectric", "default": true, "id": "melting-point/cln/volk2008", "kind": "scalar", "name": "Melting point", "notes": "Inside the 1240-1275 C range quoted across vendors and handbooks.", "property": "melting-point", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nikogosyan 2005", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_m", "unit": { "display": "C", "ucum": "Cel" }, "value": 1255, "variant": "cln" }, { "category": "ferroelectric", "default": true, "id": "melting-point/sln/volk2008", "kind": "scalar", "name": "Melting point", "property": "melting-point", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nikogosyan 2005", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "T_m", "unit": { "display": "C", "ucum": "Cel" }, "value_text": "< 1200", "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "photorefractive", "default": true, "id": "mgo-photorefractive-threshold/mgo5-cln/bryan1984", "kind": "scalar", "name": "MgO concentration threshold for optical-damage resistance", "notes": "Abstract: about 100x photoconductivity increase; activation energy 0.1 eV (resistant) vs 0.5 eV.", "property": "mgo-photorefractive-threshold", "provenance": { "locator": "abstract", "source_id": "bryan1984", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "at.% MgO", "ucum": "%" }, "value_text": ">= 4.5 at.% MgO", "variant": "mgo5-cln" }, { "category": "structure", "id": "mohs-hardness/cln/cti1999", "kind": "scalar", "name": "Mohs hardness", "property": "mohs-hardness", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "Mohs", "ucum": "1" }, "value": 5, "variant": "cln" }, { "category": "optical", "conditions": { "method": "parametric fluorescence, 488 nm pump" }, "id": "nlo-d31/cln/kitamoto1995-488nm", "kind": "scalar", "name": "Second-order nonlinear coefficient d31", "notes": "Abstract judges an earlier 5.8 pm/V overestimated.", "property": "nlo-d31", "provenance": { "locator": "abstract", "source_id": "kitamoto1995", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "d31", "tensor_component": "d31", "uncertainty": { "type": "stated", "value": 0.5 }, "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 4.8, "variant": "cln" }, { "category": "optical", "conditions": { "method": "parametric fluorescence, 532 nm pump" }, "id": "nlo-d31/cln/kitamoto1995-532nm", "kind": "scalar", "name": "Second-order nonlinear coefficient d31", "property": "nlo-d31", "provenance": { "locator": "abstract", "source_id": "kitamoto1995", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "d31", "tensor_component": "d31", "uncertainty": { "type": "stated", "value": 0.5 }, "unit": { "display": "pm/V", "ucum": "pm/V" }, "value": 4.3, "variant": "cln" }, { "category": "optical", "conditions": { "method": "Z-scan, 30 ps, e-polarization", "wavelength_nm": 1064 }, "default": true, "id": "nonlinear-index-n2/unspecified/desalvo1996-1064nm", "kind": "scalar", "name": "Nonlinear (Kerr) refractive index", "property": "nonlinear-index-n2", "provenance": { "source_id": "desalvo1996", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_2", "unit": { "display": "m^2/W", "ucum": "m2/W" }, "value": 9.33e-20, "variant": "unspecified" }, { "category": "optical", "conditions": { "method": "Z-scan, 22 ps", "wavelength_nm": 532 }, "id": "nonlinear-index-n2/unspecified/desalvo1996-532nm", "kind": "scalar", "name": "Nonlinear (Kerr) refractive index", "property": "nonlinear-index-n2", "provenance": { "source_id": "desalvo1996", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_2", "unit": { "display": "m^2/W", "ucum": "m2/W" }, "value": 8.25e-19, "variant": "unspecified" }, { "category": "optical", "id": "nonlinear-index-n2/unspecified/zhu2021", "kind": "scalar", "name": "Nonlinear (Kerr) refractive index", "notes": "Wavelength and primary measurement not given in the review table.", "property": "nonlinear-index-n2", "provenance": { "locator": "Table 1", "source_id": "zhu2021", "status": "S", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_2", "unit": { "display": "m^2/W", "ucum": "m2/W" }, "value": 1.8e-19, "variant": "unspecified" }, { "category": "optical", "default": true, "id": "oh-stretch-band/cln/bryan1984", "kind": "scalar", "name": "OH stretch absorption band", "property": "oh-stretch-band", "provenance": { "locator": "abstract", "source_id": "bryan1984", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "um", "ucum": "um" }, "value": 2.87, "variant": "cln" }, { "category": "optical", "default": true, "id": "oh-stretch-band/mgo5-cln/bryan1984", "kind": "scalar", "name": "OH stretch absorption band", "property": "oh-stretch-band", "provenance": { "locator": "abstract", "source_id": "bryan1984", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "um", "ucum": "um" }, "value": 2.83, "variant": "mgo5-cln", "variant_note": "MgO >= 4.5 at.%" }, { "category": "optical", "conditions": { "method": "optical absorption (direct)" }, "default": true, "id": "optical-band-gap/unspecified/thierfelder2010", "kind": "scalar", "name": "Optical band gap (frequently cited)", "notes": "GW calculations give a fundamental (quasiparticle) gap at least 1 eV larger; the quasiparticle gap is debated.", "property": "optical-band-gap", "provenance": { "locator": "abstract", "source_id": "thierfelder2010", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "E_g", "uncertainty": { "type": "approximate" }, "unit": { "display": "eV", "ucum": "eV" }, "value": 3.7, "variant": "unspecified" }, { "category": "structure", "default": true, "id": "point-group/unspecified/weis1985", "kind": "scalar", "name": "Point group (ferroelectric phase)", "notes": "weis1985 prints the Schoenflies symbol as C6v, a typo; 3m is C3v. Same in volk2008 p. 2.", "property": "point-group", "provenance": { "locator": "p. 192, Sec. 2.1", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "-", "ucum": "1" }, "value_text": "3m (C3v)", "variant": "unspecified" }, { "category": "thermal", "conditions": { "temperature_C": 25 }, "id": "pyroelectric-p3/cln/cti1999", "kind": "scalar", "name": "Pyroelectric coefficient", "notes": "Sign convention not stated in the data sheet.", "property": "pyroelectric-p3", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "p_3", "unit": { "display": "C/(m^2 K)", "ucum": "C/(m2.K)" }, "value": -8.3e-05, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "id": "pyroelectric-p3/unspecified/schwesyg2011", "kind": "scalar", "name": "Pyroelectric coefficient", "property": "pyroelectric-p3", "provenance": { "locator": "Eq. (2.17)", "original_reference": "Bartholomaus, Buse, Deuper, Kratzig, phys. stat. sol. (a) 142, 55 (1994)", "source_id": "schwesyg2011", "status": "S", "transcribed": "2026-10-25" }, "public": true, "symbol": "p_3", "unit": { "display": "C/(m^2 K)", "ucum": "C/(m2.K)" }, "value": -6.4e-05, "variant": "unspecified", "variant_note": "'crystals of different compositions'" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "frame": { "convention": "IRE-1949", "handedness": "right", "setting": "crystal-physics", "x": "a axis, perpendicular to a mirror plane", "y": "in a mirror plane", "z": "polar c axis", "z_sign_definition": "+c points out of the face that becomes negative on compression; equivalently it becomes positive on cooling (weis1985 pp. 192-193)" }, "id": "pyroelectric-p3/unspecified/weis1985", "kind": "scalar", "name": "Pyroelectric coefficient", "notes": "p3 < 0 means that on cooling the +c face becomes more positive (weis1985 p. 196). Magnitudes across sources span 4-9.5e-5 C/(m^2 K).", "property": "pyroelectric-p3", "provenance": { "locator": "Eq. (2), p. 196", "original_reference": "Savage, J. Appl. Phys. 37, 3071 (1966)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "p_3", "unit": { "display": "C/(m^2 K)", "ucum": "C/(m2.K)" }, "value": -4e-05, "variant": "unspecified" }, { "category": "optical", "conditions": { "wavelength_nm": 632.8 }, "id": "refractive-index-e/cln/cti1999-632.8nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2028, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 24.5, "wavelength_nm": 1060 }, "id": "refractive-index-e/cln/weis1985-1060nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Nelson & Mikulyak, J. Appl. Phys. 45, 3688 (1974)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1561, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 24.5, "wavelength_nm": 632.8 }, "id": "refractive-index-e/cln/weis1985-632.8nm", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "6e-4 above the Zelmon value at 21 C.", "property": "refractive-index-e", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Nelson & Mikulyak, J. Appl. Phys. 45, 3688 (1974)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2028, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "refractive-index-e/cln/zelmon1997-1064nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1555, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "refractive-index-e/cln/zelmon1997-1550nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1376, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "refractive-index-e/cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-e at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2022, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 1000 }, "default": true, "id": "refractive-index-e/lt-unspecified/bond1965-1000nm", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-e", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-e tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1432, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 1600 }, "default": true, "id": "refractive-index-e/lt-unspecified/bond1965-1600nm", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-e", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-e tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1213, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 600 }, "default": true, "id": "refractive-index-e/lt-unspecified/bond1965-600nm", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-e", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-e tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1878, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "refractive-index-e/mgo5-cln/zelmon1997-1064nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1474, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "refractive-index-e/mgo5-cln/zelmon1997-1550nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1299, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "refractive-index-e/mgo5-cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Extraordinary refractive index", "property": "refractive-index-e", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-e at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1928, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "wavelength_nm": 633 }, "default": true, "id": "refractive-index-e/sln/volk2008-633nm", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "The generalized (Schlarb) Sellmeier gives 2.1867 at 50.0 mol% (computed), supporting this value.", "property": "refractive-index-e", "provenance": { "locator": "Table 1.2, p. 4 (refs. [26-28])", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.19, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 632.8 }, "id": "refractive-index-e/sln/weis1985-boyd1967", "kind": "scalar", "name": "Extraordinary refractive index", "notes": "Conflicts with volk2008 near-SLN values.", "property": "refractive-index-e", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Boyd, Bond, Carter, J. Appl. Phys. 38, 1941 (1967)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_e", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2005, "variant": "sln", "variant_note": "labelled 'stoichiometric' (1967 crystal)" }, { "category": "optical", "conditions": { "wavelength_nm": 632.8 }, "id": "refractive-index-o/cln/cti1999-632.8nm", "kind": "scalar", "name": "Ordinary refractive index", "notes": "Identical to Nelson & Mikulyak 1974.", "property": "refractive-index-o", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2866, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 24.5, "wavelength_nm": 1060 }, "id": "refractive-index-o/cln/weis1985-1060nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Nelson & Mikulyak, J. Appl. Phys. 45, 3688 (1974)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2323, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 24.5, "wavelength_nm": 632.8 }, "id": "refractive-index-o/cln/weis1985-632.8nm", "kind": "scalar", "name": "Ordinary refractive index", "notes": "weis1985 Table 2 misprints n_o at 472.7 nm as 3.3597.", "property": "refractive-index-o", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Nelson & Mikulyak, J. Appl. Phys. 45, 3688 (1974)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2866, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "refractive-index-o/cln/zelmon1997-1064nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-o at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2321, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "refractive-index-o/cln/zelmon1997-1550nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-o at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2111, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "refractive-index-o/cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-cln-o at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2865, "variant": "cln" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 1000 }, "default": true, "id": "refractive-index-o/lt-unspecified/bond1965-1000nm", "kind": "scalar", "name": "Ordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-o", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-o tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1391, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 1600 }, "default": true, "id": "refractive-index-o/lt-unspecified/bond1965-1600nm", "kind": "scalar", "name": "Ordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-o", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-o tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1174, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_text": "room temperature", "wavelength_nm": 600 }, "default": true, "id": "refractive-index-o/lt-unspecified/bond1965-600nm", "kind": "scalar", "name": "Ordinary refractive index", "notes": "n_e > n_o at every tabulated wavelength (0.45-4.0 um) in this dataset: LT is weakly positive uniaxial here, unlike LN.", "property": "refractive-index-o", "provenance": { "locator": "refractiveindex.info LiTaO3/Bond-o tabulated data", "source_id": "bond1965", "status": "P-db", "transcribed": "2026-10-25", "via": "rii" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.1834, "variant": "lt-unspecified", "variant_note": "1965 bulk crystal" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1064.0 }, "default": true, "id": "refractive-index-o/mgo5-cln/zelmon1997-1064nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-o at 1064 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2288, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 1550.0 }, "default": true, "id": "refractive-index-o/mgo5-cln/zelmon1997-1550nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-o at 1550 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2082, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "temperature_C": 21, "wavelength_nm": 632.8 }, "default": true, "id": "refractive-index-o/mgo5-cln/zelmon1997-632.8nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "derivation": "evaluated from dispersion model zelmon1997-mgo5-o at 632.8 nm, 21 C by scripts/build_data.py (rounded to 1e-4)", "source_id": "zelmon1997", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.2825, "variant": "mgo5-cln" }, { "category": "optical", "conditions": { "wavelength_nm": 633 }, "default": true, "id": "refractive-index-o/sln/volk2008-633nm", "kind": "scalar", "name": "Ordinary refractive index", "property": "refractive-index-o", "provenance": { "locator": "Table 1.2, p. 4 (refs. [26-28])", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.288, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "conditions": { "temperature_C": 25, "wavelength_nm": 632.8 }, "id": "refractive-index-o/sln/weis1985-boyd1967", "kind": "scalar", "name": "Ordinary refractive index", "notes": "Conflicts with volk2008 near-SLN values.", "property": "refractive-index-o", "provenance": { "locator": "Table 2, p. 197", "original_reference": "Boyd, Bond, Carter, J. Appl. Phys. 38, 1941 (1967)", "source_id": "weis1985", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "n_o", "unit": { "display": "-", "qudt": "http://qudt.org/vocab/unit/UNITLESS", "ucum": "1" }, "value": 2.291, "variant": "sln", "variant_note": "labelled 'stoichiometric' (1967 crystal)" }, { "category": "optical", "default": true, "id": "residual-absorption/cln/schwesyg2011", "kind": "scalar", "name": "Residual absorption, as-grown crystals", "property": "residual-absorption", "provenance": { "locator": "abstract; Sec. 3.1, 3.3", "source_id": "schwesyg2011", "status": "P", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "cm^-1", "ucum": "/cm" }, "value_text": "up to 0.04 cm^-1 (transition-metal impurities, 400-2000 nm); about 0.001 cm^-1 H-related bands at 2300-2800 nm; annealing lowers absorption by up to 10x", "variant": "cln", "variant_note": "CLN and MgO5 crystals" }, { "category": "structure", "id": "rhombohedral-a/unspecified/hsu1997", "kind": "scalar", "name": "Rhombohedral cell edge a_R", "property": "rhombohedral-a", "provenance": { "locator": "COD 2101845", "source_id": "hsu1997", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "a_R", "uncertainty": { "type": "stated", "value": 0.002 }, "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.493, "variant": "unspecified" }, { "category": "structure", "default": true, "id": "rhombohedral-a/unspecified/weis1985", "kind": "scalar", "name": "Rhombohedral cell edge a_R", "property": "rhombohedral-a", "provenance": { "locator": "p. 194, Eq. (1)", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "a_R", "unit": { "display": "Angstrom", "ucum": "Ao" }, "value": 5.494, "variant": "unspecified" }, { "category": "structure", "id": "rhombohedral-alpha/unspecified/hsu1997", "kind": "scalar", "name": "Rhombohedral cell angle alpha", "property": "rhombohedral-alpha", "provenance": { "locator": "COD 2101845", "source_id": "hsu1997", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_R", "uncertainty": { "type": "stated", "value": 0.03 }, "unit": { "display": "deg", "ucum": "deg" }, "value": 55.89, "variant": "unspecified" }, { "category": "structure", "default": true, "id": "rhombohedral-alpha/unspecified/weis1985", "kind": "scalar", "name": "Rhombohedral cell angle alpha", "property": "rhombohedral-alpha", "provenance": { "locator": "p. 194, Eq. (1)", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_R", "unit": { "display": "deg", "ucum": "deg" }, "value": 55.867, "variant": "unspecified" }, { "category": "structure", "default": true, "id": "space-group-paraelectric/unspecified/boysen1994", "kind": "scalar", "name": "Space group (paraelectric phase, above Tc)", "notes": "volk2008 p. 2 prints R3m without a reference (conflict); the CIF value is kept.", "property": "space-group-paraelectric", "provenance": { "locator": "COD 2101175-2101185 high-temperature entries", "source_id": "boysen1994", "status": "P-db", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "-", "ucum": "1" }, "value_text": "R-3c (No. 167)", "variant": "unspecified" }, { "category": "structure", "default": true, "id": "space-group/unspecified/weis1985", "kind": "scalar", "name": "Space group (ferroelectric phase, below Tc)", "property": "space-group", "provenance": { "locator": "p. 192, Sec. 2.1", "source_id": "weis1985", "status": "P", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "-", "ucum": "1" }, "value_text": "R3c (No. 161)", "variant": "unspecified" }, { "category": "thermal", "conditions": { "temperature_C": 25 }, "id": "specific-heat/cln/cti1999", "kind": "scalar", "name": "Specific heat capacity", "property": "specific-heat", "provenance": { "derivation": "converted from 0.15 cal/(g C)", "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "c_p", "uncertainty": { "type": "approximate" }, "unit": { "display": "J/(kg K)", "qudt": "http://qudt.org/vocab/unit/J-PER-KiloGM-K", "ucum": "J/(kg.K)" }, "value": 628, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "specific-heat/cln/volk2008", "kind": "scalar", "name": "Specific heat capacity", "property": "specific-heat", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nakamura et al., J. Cryst. Growth 290, 144 (2006)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "c_p", "unit": { "display": "J/(kg K)", "qudt": "http://qudt.org/vocab/unit/J-PER-KiloGM-K", "ucum": "J/(kg.K)" }, "value": 628, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "specific-heat/sln/volk2008", "kind": "scalar", "name": "Specific heat capacity", "property": "specific-heat", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nakamura et al., J. Cryst. Growth 290, 144 (2006)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "c_p", "unit": { "display": "J/(kg K)", "qudt": "http://qudt.org/vocab/unit/J-PER-KiloGM-K", "ucum": "J/(kg.K)" }, "value": 651, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "ferroelectric", "id": "spontaneous-polarization/cln/gopalan1998", "kind": "scalar", "name": "Spontaneous polarization", "notes": "Abstract: insensitive to stoichiometry and H content.", "property": "spontaneous-polarization", "provenance": { "locator": "abstract", "source_id": "gopalan1998", "status": "P(abs)", "transcribed": "2026-10-25" }, "public": true, "symbol": "P_s", "uncertainty": { "type": "stated", "value": 5 }, "unit": { "display": "uC/cm^2", "ucum": "uC/cm2" }, "value": 80, "variant": "cln", "variant_note": "abstract gives the value for CLN and near-SLN alike" }, { "category": "ferroelectric", "conditions": { "temperature_text": "room temperature" }, "id": "spontaneous-polarization/cln/volk2008", "kind": "scalar", "name": "Spontaneous polarization", "notes": "Mismatch with gopalan1998 (80 +- 5). volk2008 ref. [24] (APL 73, 3073) is a LiTaO3 paper per Crossref.", "property": "spontaneous-polarization", "provenance": { "locator": "Table 1.1, p. 3 (refs. [22], [24])", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "P_s", "unit": { "display": "uC/cm^2", "ucum": "uC/cm2" }, "value": 71, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_C": 25 }, "id": "thermal-conductivity/cln/cti1999", "kind": "scalar", "name": "Thermal conductivity", "property": "thermal-conductivity", "provenance": { "derivation": "converted from 1.0e-2 cal/(cm s C)", "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "kappa", "uncertainty": { "type": "approximate" }, "unit": { "display": "W/(m K)", "qudt": "http://qudt.org/vocab/unit/W-PER-M-K", "ucum": "W/(m.K)" }, "value": 4.2, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "thermal-conductivity/cln/volk2008", "kind": "scalar", "name": "Thermal conductivity", "notes": "Axis not stated in the compilation.", "property": "thermal-conductivity", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nakamura et al., J. Cryst. Growth 290, 144 (2006)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "kappa", "unit": { "display": "W/(m K)", "qudt": "http://qudt.org/vocab/unit/W-PER-M-K", "ucum": "W/(m.K)" }, "value": 3.92, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "room temperature" }, "default": true, "id": "thermal-conductivity/sln/volk2008", "kind": "scalar", "name": "Thermal conductivity", "property": "thermal-conductivity", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nakamura et al., J. Cryst. Growth 290, 144 (2006)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "kappa", "unit": { "display": "W/(m K)", "qudt": "http://qudt.org/vocab/unit/W-PER-M-K", "ucum": "W/(m.K)" }, "value": 5.97, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "thermal", "id": "thermal-conductivity/unspecified/schwesyg2011", "kind": "scalar", "name": "Thermal conductivity", "property": "thermal-conductivity", "provenance": { "locator": "Eq. (2.28)", "original_reference": "Wong 2002 (EMIS Datareview 28)", "source_id": "schwesyg2011", "status": "S", "transcribed": "2026-10-25" }, "public": true, "symbol": "kappa", "unit": { "display": "W/(m K)", "qudt": "http://qudt.org/vocab/unit/W-PER-M-K", "ucum": "W/(m.K)" }, "value": 5, "variant": "unspecified" }, { "category": "thermal", "conditions": { "temperature_C": 25 }, "id": "thermal-expansion-a/cln/cti1999", "kind": "scalar", "name": "Thermal expansion coefficient perpendicular to c", "property": "thermal-expansion-a", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_11", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 1.5e-05, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_C": null, "temperature_text": "300 K" }, "default": true, "id": "thermal-expansion-a/cln/volk2008", "kind": "scalar", "name": "Thermal expansion coefficient perpendicular to c", "property": "thermal-expansion-a", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nikogosyan 2005; Gallagher et al., Ferroelectrics 75, 71 (1987)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_11", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 1.41e-05, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "300 K" }, "default": true, "id": "thermal-expansion-a/sln/volk2008", "kind": "scalar", "name": "Thermal expansion coefficient perpendicular to c", "property": "thermal-expansion-a", "provenance": { "locator": "Table 1.1, p. 3", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_11", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 1.41e-05, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "thermal", "conditions": { "temperature_C": 25 }, "id": "thermal-expansion-c/cln/cti1999", "kind": "scalar", "name": "Thermal expansion coefficient parallel to c", "property": "thermal-expansion-c", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_33", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 7.5e-06, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "300 K" }, "default": true, "id": "thermal-expansion-c/cln/volk2008", "kind": "scalar", "name": "Thermal expansion coefficient parallel to c", "notes": "alpha_c in circulating sources spans about 4-7.5 ppm/K; kim1969 (primary) not read. weis1985 p. 195 notes that c contracts from 600 to 1000 C.", "property": "thermal-expansion-c", "provenance": { "locator": "Table 1.1, p. 3", "original_reference": "Nikogosyan 2005; Gallagher et al., Ferroelectrics 75, 71 (1987)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_33", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 4.1e-06, "variant": "cln" }, { "category": "thermal", "conditions": { "temperature_text": "300 K" }, "default": true, "id": "thermal-expansion-c/sln/volk2008", "kind": "scalar", "name": "Thermal expansion coefficient parallel to c", "notes": "alpha_c depends on composition, which may explain part of the spread across sources.", "property": "thermal-expansion-c", "provenance": { "locator": "Table 1.1, p. 3", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "symbol": "alpha_33", "unit": { "display": "1/K", "qudt": "http://qudt.org/vocab/unit/PER-K", "ucum": "/K" }, "value": 6e-06, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "default": true, "id": "transparency-range/cln/volk2008", "kind": "scalar", "max": 5, "min": 0.32, "name": "Transparency range", "notes": "Criterion and thickness not stated.", "property": "transparency-range", "provenance": { "locator": "Table 1.2, p. 4", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "um", "ucum": "um" }, "variant": "cln" }, { "category": "optical", "default": true, "id": "transparency-range/sln/volk2008", "kind": "scalar", "max": 5, "min": 0.3, "name": "Transparency range", "notes": "Criterion and thickness not stated.", "property": "transparency-range", "provenance": { "locator": "Table 1.2, p. 4", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "um", "ucum": "um" }, "variant": "sln", "variant_note": "near-stoichiometric" }, { "category": "optical", "conditions": { "method": "1/e transmission, 1 cm thick" }, "id": "uv-cutoff/cln/cti1999", "kind": "scalar", "name": "UV transmission cutoff", "property": "uv-cutoff", "provenance": { "source_id": "cti1999", "status": "V", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "nm", "ucum": "nm" }, "value": 340, "variant": "cln" }, { "category": "optical", "conditions": { "method": "absorption coefficient 20 (or 15) cm^-1; E parallel to c, k perpendicular to c", "temperature_C": 22 }, "default": true, "id": "uv-edge-formula/unspecified/volk2008-kovacs1997", "kind": "scalar", "name": "UV absorption edge vs composition", "property": "uv-edge-formula", "provenance": { "locator": "Eqs. (6.5)-(6.6), p. 142", "original_reference": "kovacs1997 (credited in Fig. 6.4)", "source_id": "volk2008", "status": "P-comp", "transcribed": "2026-10-25" }, "public": true, "unit": { "display": "nm", "ucum": "nm" }, "value_text": "lambda_20 = 320.4 - 1.829 x - 5.485 x^2 nm; lambda_15 = 321.9 - 1.597 x - 5.745 x^2 nm; x = (mol% Li2O) - 48.38", "variant": "unspecified" }, { "category": "optical", "conditions": { "temperature_C": 22 }, "default": true, "id": "uv-edge-lambda20/cln/volk2008-kovacs1997", "kind": "scalar", "name": "UV absorption edge at alpha = 20 cm^-1", "property": "uv-edge-lambda20", "provenance": { "derivation": "lambda_20 formula at x = 0 (48.38 mol%)", "locator": "Eq. (6.5), p. 142", "source_id": "volk2008", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "lambda_20", "unit": { "display": "nm", "ucum": "nm" }, "value": 320.4, "variant": "cln", "variant_note": "48.38 mol% Li2O" }, { "category": "optical", "conditions": { "temperature_C": 22 }, "default": true, "id": "uv-edge-lambda20/sln/volk2008-kovacs1997", "kind": "scalar", "name": "UV absorption edge at alpha = 20 cm^-1", "property": "uv-edge-lambda20", "provenance": { "derivation": "lambda_20 formula at x = 1.62 (50.0 mol%); 317.2 nm at 49.0 mol%", "locator": "Eq. (6.5), p. 142", "source_id": "volk2008", "status": "C", "transcribed": "2026-10-25" }, "public": true, "symbol": "lambda_20", "unit": { "display": "nm", "ucum": "nm" }, "value": 303.0, "variant": "sln", "variant_note": "50.0 mol% Li2O" } ] }