{
  "id": "enwiki-001345463864",
  "slug": "johannite",
  "title": "Johannite",
  "qid": "",
  "lead": "Johannite is a rare uranium sulfate mineral. It crystallizes in the triclinic crystal system with the chemical composition Cu[UO 2 (OH)SO 4 ] 2 ·8H 2 O. It crystallizes in the triclinic system and develops only small prism or thin to thick tabular crystals, usually occurs as flaky or spheroidal aggregates and efflorescent coatings. Its color is emerald-green to apple-green and its streak is pale green. Johannite is a strong radioactive mineral with a calculated activity of 87,501,143 Bq/g (to the comparison: natural potassium: 31.2 Bq/g).",
  "body": "Johannite is a rare uranium sulfate mineral. It crystallizes in the triclinic crystal system with the chemical composition Cu[UO 2 (OH)SO 4 ] 2 ·8H 2 O. It crystallizes in the triclinic system and develops only small prism or thin to thick tabular crystals, usually occurs as flaky or spheroidal aggregates and efflorescent coatings. Its color is emerald-green to apple-green and its streak is pale green. Johannite is a strong radioactive mineral with a calculated activity of 87,501,143 Bq/g (to the comparison: natural potassium: 31.2 Bq/g). Johannite crystallizes in the triclinic crystal system in the space group P with the lattice parameters a = 8.92 Å, b = 9.59 Å, c = 6.84 Å; α = 110°, β = 111.98°, γ = 100.3° and one formula unit per unit cell. ==Bibliography== Palache, P.; Berman H.; Frondel, C. (1960). \"Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)\" John Wiley and Sons, Inc., New York, pp. 606–607.",
  "categories": [
    "109366734",
    "109378442",
    "23118434",
    "23603337",
    "25704440",
    "25704448",
    "28269686",
    "74589519"
  ],
  "license": "CC BY-SA 4.0",
  "source_uri": "https://en.wikipedia.org/w/index.php?oldid=1345463864",
  "content_hash": "",
  "created_at": null,
  "updated_at": 1774504645.0,
  "claims": [],
  "contradictions": [],
  "confidence": 0.6,
  "csl": {
    "id": "enwiki-001345463864",
    "type": "webpage",
    "title": "Johannite",
    "author": [
      {
        "family": "Anticloud FZ LLE",
        "literal": "Anticloud FZ LLE"
      }
    ],
    "container-title": "encyclopegia.org",
    "publisher": "Anticloud FZ LLE",
    "publisher-place": "Dubai, United Arab Emirates",
    "URL": "https://encyclopegia.org/a/johannite",
    "issued": {
      "date-parts": [
        [
          2026,
          11,
          15
        ]
      ]
    },
    "accessed": {
      "date-parts": [
        [
          2026,
          11,
          15
        ]
      ]
    },
    "license": "CC BY-SA 4.0",
    "DOI": "eo1:enwiki-001345463864",
    "isBasedOn": "https://en.wikipedia.org/w/index.php?oldid=1345463864",
    "note": "Immutable snapshot enwiki-001345463864"
  }
}