Mineralogy Database

Coffinite Mineral Data

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General Coffinite Information

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