Mineralogy Database

Brockite Mineral Data

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General Brockite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Th,Ce)(PO4)•(H2O)
Help on Composition: Composition: Molecular Weight = 220.66 gm
   Calcium     10.90 %  Ca   15.25 % CaO
   Cerium       6.35 %  Ce    7.44 % Ce2O3
   Thorium     31.55 %  Th   35.90 % ThO2
   Phosphorus  14.04 %  P    32.16 % P2O5
   Hydrogen     0.91 %  H     8.16 % H2O
   Oxygen      36.25 %  O
              ______        ______ 
              100.00 %       98.91 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.6Th0.3Ce0.1(PO4)•(H2O)
Help on Environment: Environment: A rare accessory mineral in granite and granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: In the USA, in a prospect pit about one km east of the Bassick mine, Querida, Wet Mountains, and at the Hardwick mine and Nightingale shaft, Custer Co., Colorado. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Maurice R. Brock, U.S. Geological Survey, who supplied the first specimen.
Help on Name Pronunciation: Name Pronunciation: Brockite Say BROCKITE
Help on Synonym: Synonym: Silicosmirnovskite