Mineralogy Database

Birchite Mineral Data

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General Birchite Information

Help on Chemical  Formula: Chemical Formula: Cd2Cu2(PO4)2(SO4)•5H2O
Help on Composition: Composition: Molecular Weight = 741.06 gm
   Calcium      0.11 %  Ca    0.15 % CaO
   Manganese    0.15 %  Mn    0.19 % MnO
   Zinc         0.88 %  Zn    1.10 % ZnO
   Cadmium     31.70 %  Cd   36.22 % CdO
   Copper      16.64 %  Cu   20.82 % CuO
   Phosphorus   8.65 %  P    19.82 % P2O5
   Hydrogen     1.36 %  H    12.16 % H2O
   Sulfur       3.81 %  S     9.51 % SO3
   Oxygen      36.70 %  O
              ______        ______ 
              100.00 %       99.97 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu1.94P2.07S0.88O12•5(H2O)Zn0.1Cd2.09Ca0.02Mn2+0.02
Help on Environment: Environment: Late-stage supergene mineral formed as part of a suite of secondary phosphate minerals under low-temperature conditions. New structure type.
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Block 14 Opencut, Broken Hill, New South Wales, Australia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William D. Birch, Senior Curator of Geosciences at Museum Victoria, Australia, in recognition of his contribution to Australian geological sciences.
Help on Synonym: Synonym: IMA2006-048