{
  "alternatives": [
    {
      "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"
    }
  ],
  "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": "internal-field",
    "variant": "cln"
  },
  "recommended": [
    {
      "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"
    }
  ],
  "recommended_note": null,
  "spread": null
}