Mineralogy Database

Bassetite Mineral Data

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General Bassetite Information

Help on Chemical  Formula: Chemical Formula: Fe++(UO2)2(PO4)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 929.97 gm
   Uranium     51.19 %  U    58.07 % UO2
   Iron         6.01 %  Fe    7.73 % FeO
   Phosphorus   6.66 %  P    15.26 % P2O5
   Hydrogen     1.73 %  H    15.50 % H2O
   Oxygen      34.41 %  O
              ______        ______ 
              100.00 %       96.56 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+(UO2)2(PO4)2•8(H2O)
Help on Environment: Environment: Occurs as a rare secondary mineral in the oxidized zone of some uranium-bearing hydrothermal mineral deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1915
Help on Locality: Locality: In England, from the Basset group of mines, Illogan, and the South Terras mine, St. Stephen-in-Brannel, Cornwall. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Basset mine group, Cornwall, England, from which it was first described.
Help on Name Pronunciation: Name Pronunciation: Bassetite + Pronunciation Say BASSETITE
Help on Synonym: Synonym: Iron uralite