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      "@type": "ChemicalSubstance",
      "chemicalComposition": "LiNbO3",
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    "creator": {
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      "name": "Wentao Jiang"
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    "description": "Hydrostatic piezoelectric coefficient d_h = 2 d31 + d33 of lithium niobate (LiNbO3): 1 provenance-tagged value(s) from 1 source(s) for variant(s) unspecified. Each value carries conditions, uncertainty, the source locator and a status code (P primary, P-comp compilation, P-db database, S secondary, V vendor, C computed).",
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    "license": "https://creativecommons.org/licenses/by/4.0/",
    "name": "LiNbO3 Hydrostatic piezoelectric coefficient d_h = 2 d31 + d33",
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        "@type": "PropertyValue",
        "measurementTechnique": "see source",
        "name": "d_h (unspecified)",
        "unitText": "pC/N",
        "value": 6.31
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    "api_version": "v1",
    "attribution": "lithium-niobate.com data compiled by Wentao Jiang; cite the original sources listed per value.",
    "count": 1,
    "data_version": "0.1.0",
    "documentation": "https://lithium-niobate.com/api/openapi.json",
    "license": {
      "id": "CC-BY-4.0",
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      "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": {
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        "value": 0.014
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