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Fornacite Mineral Data
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General Fornacite Information
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 Chemical Formula: |
Pb2Cu(CrO4)(AsO4)(OH) |
| Composition: |
Molecular Weight = 749.87 gm |
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Chromium 6.93 % Cr 13.33 % CrO3 |
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Copper 8.47 % Cu 9.54 % Cu2O |
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Arsenic 9.99 % As 15.33 % As2O5 |
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Hydrogen 0.13 % H 1.20 % H2O |
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Lead 55.26 % Pb 59.53 % PbO |
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Oxygen 19.20 % O |
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______ ______ |
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100.00 % 98.93 % = TOTAL OXIDE |
| Empirical Formula: |
Pb2Cu(AsO4)(CrO4)(OH) |
| Environment: |
Oxidized zones of some hydrothermal base-metal deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1915 |
| Locality: |
Djoue and Reneville, Congo Republic. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Lucien Lewis Forneau (1867-1930), Colonial Governor of the French Congo. |
| Name Pronunciation: |
Fornacite + Pronunciation  |
| Synonym: |
ICSD 26828 |
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PDF 15-200 |
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