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    "about": {
      "@type": "ChemicalSubstance",
      "chemicalComposition": "LiNbO3",
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    "description": "Coercive field of lithium niobate (LiNbO3): 4 provenance-tagged value(s) from 1 source(s) for variant(s) cln, mgo1-sln, mgo5-cln, sln. 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 Coercive field",
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        "measurementTechnique": "see source",
        "name": "E_c (cln)",
        "unitText": "kV/mm",
        "value": 21
      },
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        "measurementTechnique": "see source",
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        "value": 2.5
      },
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        "minValue": 6.0,
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    {
      "category": "ferroelectric",
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      },
      "default": true,
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      "name": "Coercive field",
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        "locator": "Table 7.1, p. 185 (210 kV/cm, literature average); p. 118 (210-220 kV/cm)",
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        "transcribed": "2026-10-25"
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      "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"
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      "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.",
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        "transcribed": "2026-10-25"
      },
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      "unit": {
        "display": "kV/mm",
        "ucum": "kV/mm"
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