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Johannite Mineral Data
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General Johannite Information
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 Chemical Formula: |
Cu(UO2)2(SO4)2(OH)2•8(H2O) |
| Composition: |
Molecular Weight = 973.87 gm |
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Uranium 48.88 % U 55.45 % UO2 |
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Copper 6.53 % Cu 7.35 % Cu2O |
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Hydrogen 1.86 % H 16.65 % H2O |
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Sulfur 6.59 % S 16.44 % SO3 |
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Oxygen 36.14 % O |
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______ ______ |
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100.00 % 95.89 % = TOTAL OXIDE |
| Empirical Formula: |
Cu(UO2)2(SO4)2(OH)2•8(H2O) |
| Environment: |
Formed from the oxidation of uraninite usually in the presence of gypsum. |
| IMA Status: |
Valid Species (Pre-IMA) 1830 |
| Locality: |
Jachymov, Bohemia, Czech Republic. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Archduke Johann (1782-1859) of Austria, fornder of the Styrian Landsmuseum ing Graz. |
| Name Pronunciation: |
Johannite + Pronunciation  |
| Synonym: |
ICSD 17071 |
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PDF 17-530 |
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