{
  "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": "optical-band-gap",
    "variant": "unspecified"
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  "recommended": [
    {
      "category": "optical",
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        "method": "optical absorption (direct)"
      },
      "default": true,
      "id": "optical-band-gap/unspecified/thierfelder2010",
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      "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",
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}