Mineralogy Database

Andyrobertsite Mineral Data

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General Andyrobertsite Information

Help on Chemical Formula: Chemical Formula: KCdCu5(AsO4)4[As(OH)2O2]•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,201.88 gm
   Potassium   3.25 %  K     3.92 % K2O
   Cadmium     9.35 %  Cd   10.68 % CdO
   Copper     26.44 %  Cu   33.09 % CuO
   Arsenic    31.17 %  As   47.81 % As2O5
   Hydrogen    0.50 %  H     4.50 % H2O
   Oxygen     29.29 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KCdCu5(AsO4)4(As(OH)2O2)•2(H2O)
Help on Environment: Environment: Single specimen found at the mine. Forms a series with calcioandyrobertsite.
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Tsumeb Mine, Tsumeb, Namibia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Andrew C. Roberts (1950-), mineralogist with the Geological Survey of Canada, specialist in documentation of new mineral species, in particular from low-temperature seco ndary parageneses.
Help on Name Pronunciation: Name Pronunciation: Andyrobertsite + Pronunciation Say ANDYROBERTSITE
Help on Synonym: Synonym: ICSD 89894
  IMA1997-023