{
  "title": "Ultramarine color-center table",
  "description": "The sulfur color centers of ultramarine: absorption positions, the amount of trisulfur radical that already gives an intense blue, the calculated shape of the radical, and radical counts in synthetic and natural samples, one value per row with its source and how much of the source was read.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Tricks of Ear and Eye",
  "page": "https://tricksofearandeye.com/color/ultramarine/",
  "derived_from": [
    "Values transcribed row by row from the cited papers"
  ],
  "method": "Compiled by Tricks of Ear and Eye from the data listed",
  "data_credit": [
    "Values from Chukanov & Aksenov 2024 (CC BY 4.0) and Chivers & Oakley 2023 (CC BY 4.0), read in full, and from the abstract of Eaton, Mitchell & Eaton 2025; one ratio computed by Tricks of Ear and Eye"
  ]
}