Mineralogy Database

Plancheite Mineral Data

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General Plancheite Information

Help on Chemical  Formula: Chemical Formula: Cu8Si8O22(OH)4•(H2O)
Help on Composition: Composition: Molecular Weight = 1,171.08 gm
   Copper    43.41 %  Cu   54.34 % CuO
   Silicon   19.19 %  Si   41.05 % SiO2
   Hydrogen   0.52 %  H     4.62 % H2O
   Oxygen    36.89 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu8Si8O22(OH)4•(H2O)
Help on Environment: Environment: Secondary mineral in the oxidized zones of copper deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1908
Help on Locality: Locality: Tantara and Kambowe, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after J. Planche who brought it from Africa.
Help on Name Pronunciation: Name Pronunciation: Plancheite + Pronunciation Say PLANCHEITE
Help on Synonym: Synonym: Bisbeeite
  ICSD 100073
  PDF 29-576