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Coffinite Mineral Data
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General Coffinite Information
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 Chemical Formula: |
U(SiO4)1-x(OH)4x |
| Composition: |
Molecular Weight = 327.71 gm |
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Uranium 72.63 % U 82.40 % UO2 |
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Silicon 7.71 % Si 16.50 % SiO2 |
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Hydrogen 0.12 % H 1.10 % H2O |
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Oxygen 19.53 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
U(SiO4)0.9(OH)0.4 |
| Environment: |
In Colorado Plateau-type black unoxidized U-V deposits, replacing organic material in sandstone. |
| IMA Status: |
Valid Species (Pre-IMA) 1956 |
| Locality: |
La Sal No. 2 mine, Beaver Mesa, Gateway district, Mesa County, New Mexico, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Reuben Clare Coffin (1886-1972), Tulsa, Oklahoma, USA, pioneer geologist in the study of uranium deposits of the Colorado Plateau. |
| Synonym: |
ICSD 15484 |
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PDF 11-420 |
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