Mineralogy Database

Allochalcoselite Mineral Data

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General Allochalcoselite Information

Help on Chemical  Formula: Chemical Formula: Cu+Cu++5PbO2(SeO3)2Cl5
Help on Composition: Composition: Molecular Weight = 1,060.48 gm
   Copper    35.47 %  Cu    6.75 % Cu2O / 36.90 % CuO
   Lead      20.91 %  Pb   22.52 % PbO
   Selenium  14.82 %  Se   20.82 % SeO2
   Chlorine  16.75 %  Cl   16.75 % Cl
               -   %   Cl   -3.78 % -O=Cl2   
   Oxygen    12.05 %  O
            ______        ______ 
            100.00 %       99.96 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuCu4.92Pb1.07Se1.99O7.99Cl5.01
Help on Environment: Environment: Found among lead and copper selenite-chloride exhalative products associated with the fumaroles.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Second cinder cone of the northern breach of the Great Tolbachik Fissure Eruption, Kamchatka Region, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name is compositional and is derived from the Greek, a???? ("different") + ?a???? ("copper") + se??'??("selenium"), to reflect the different valences and crystallographic behavi or of copper in this selenite mineral.
Help on Synonym: Synonym: IMA2004-025