{
  "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": "hydrostatic-piezo-dh",
    "variant": "unspecified"
  },
  "recommended": [
    {
      "category": "acoustic",
      "default": true,
      "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": {
        "type": "stated",
        "value": 0.014
      },
      "unit": {
        "display": "pC/N",
        "ucum": "pC/N"
      },
      "value": 6.31,
      "variant": "unspecified"
    }
  ],
  "recommended_note": null,
  "spread": null
}