{
  "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": "uv-edge-formula",
    "variant": "unspecified"
  },
  "recommended": [
    {
      "category": "optical",
      "conditions": {
        "method": "absorption coefficient 20 (or 15) cm^-1; E parallel to c, k perpendicular to c",
        "temperature_C": 22
      },
      "default": true,
      "id": "uv-edge-formula/unspecified/volk2008-kovacs1997",
      "kind": "scalar",
      "name": "UV absorption edge vs composition",
      "property": "uv-edge-formula",
      "provenance": {
        "locator": "Eqs. (6.5)-(6.6), p. 142",
        "original_reference": "kovacs1997 (credited in Fig. 6.4)",
        "source_id": "volk2008",
        "status": "P-comp",
        "transcribed": "2026-10-25"
      },
      "public": true,
      "unit": {
        "display": "nm",
        "ucum": "nm"
      },
      "value_text": "lambda_20 = 320.4 - 1.829 x - 5.485 x^2 nm; lambda_15 = 321.9 - 1.597 x - 5.745 x^2 nm; x = (mol% Li2O) - 48.38",
      "variant": "unspecified"
    }
  ],
  "recommended_note": null,
  "spread": null
}