{
  "alternatives": [],
  "meta": {
    "api_version": "v1",
    "attribution": "lithium-niobate.com data compiled by Wentao Jiang; cite the original sources listed per value.",
    "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/"
    },
    "property": "birefringence",
    "variant": "mgo5-cln"
  },
  "recommended": [
    {
      "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"
    }
  ],
  "recommended_note": null,
  "spread": {
    "max": -0.0782,
    "min": -0.0897,
    "n_records": 3,
    "note": "Range over all public records regardless of conditions; compare conditions before use.",
    "unit": "1"
  }
}