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Rollandite Mineral Data
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General Rollandite Information
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 Chemical Formula: |
Cu3(AsO4)2•4(H2O) |
| Composition: |
Molecular Weight = 543.29 gm |
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Copper 36.26 % Cu 45.39 % CuO |
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Arsenic 27.58 % As 42.31 % As2O5 |
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Hydrogen 1.41 % H 12.60 % H2O |
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Oxygen 34.75 % O |
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______ ______ |
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100.00 % 100.29 % = TOTAL OXIDE |
| Empirical Formula: |
Cu3.1(AsO4)2•3.8(H2O) |
| Environment: |
Secondary mineral in old Cu mines. New structure-type. |
| IMA Status: |
Approved IMA 1998 (Dana # Added) |
| Locality: |
Cu mines of Roua at the western margin of the Barrot Dome, Alpes-Maritimes, France. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Pierre Rolland (1940-), an eminent mineral collector of the Roua mines. |
| Synonym: |
ICSD 90026 |
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IMA1998-001 |
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