Mineralogy Database

Pyrosmalite-(Fe) Mineral Data

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General Pyrosmalite-(Fe) Information

Help on Chemical Formula: Chemical Formula: (Fe++,Mn)8Si6O15(OH,Cl)10
Help on Composition: Composition: Molecular Weight = 1,053.90 gm
   Magnesium   0.23 %  Mg    0.38 % MgO
   Manganese   3.65 %  Mn    4.71 % MnO
   Iron       38.15 %  Fe   49.08 % FeO
   Silicon    15.99 %  Si   34.21 % SiO2
   Hydrogen    0.90 %  H     8.03 % H2O
   Chlorine    4.04 %  Cl    4.04 % Cl
                -   %   Cl   -0.91 % -O=Cl2   
   Oxygen     37.04 %  O
             ______        ______ 
             100.00 %       99.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+7.2Mn2+0.7Mg0.1Si6O15(OH)9.4Cl1.2
Help on Environment: Environment: Metamorphosed Pb-Zn deposit ores.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Nordmark in Vermland and at Dannemora, in Upsala, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Iron rich end member of pyrosmalite.
Help on Synonym: Synonym: Ferropyrosmalite - Renamed to Pyrosmalite-(Fe) by Mineralogical Record, v39 (2008), p 131