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Roscoelite Mineral Data
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General Roscoelite Information
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 Chemical Formula: |
K(V,Al,Mg)2AlSi3O10(OH)2 |
| Composition: |
Molecular Weight = 411.01 gm |
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Potassium 9.51 % K 11.46 % K2O |
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Magnesium 2.37 % Mg 3.92 % MgO |
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Aluminum 10.50 % Al 19.85 % Al2O3 |
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Vanadium 9.92 % V 17.70 % V2O5 |
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Silicon 20.50 % Si 43.86 % SiO2 |
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Hydrogen 0.49 % H 4.38 % H2O |
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Oxygen 46.71 % O |
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______ ______ |
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100.00 % 101.17 % = TOTAL OXIDE |
| Empirical Formula: |
KV5+0.8Al0.6Mg0.4AlSi3O10(OH)2 |
| Environment: |
An early stage gangue material in low-temperature epithermal Au-Ag-Te deposits and from the oxidized portions of sedimentary U-V ores. |
| IMA Status: |
Valid Species (Pre-IMA) 1876 |
| Locality: |
Stuckslacker mine, 2 miles SW of Coloma, El Dorado Co., California. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Henry Enfield Roscoe (1833-1915) of Manchester, England who first prepared pure vanadium. |
| Name Pronunciation: |
Roscoelite + Pronunciation  |
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