Mineralogy Database

Pyrosmalite-(Mn) Mineral Data

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General Pyrosmalite-(Mn) Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe++)8Si6O15(OH,Cl)10
Help on Composition: Composition: Molecular Weight = 1,071.52 gm
   Manganese  29.74 %  Mn   38.40 % MnO
   Iron        9.38 %  Fe   12.07 % FeO
   Silicon    15.73 %  Si   33.64 % SiO2
   Hydrogen    0.56 %  H     5.04 % H2O
   Chlorine   13.23 %  Cl   13.23 % Cl
                -   %   Cl   -2.99 % -O=Cl2   
   Oxygen     31.36 %  O
             ______        ______ 
             100.00 %       99.40 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5.8Fe2+1.8Si6O15(OH)6Cl4
Help on Environment: Environment: Metamorphosed iron and manganese ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
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: Manganese end member of pyrosmalite.
Help on Synonym: Synonym: Brokenhillite
  Manganpyrosmalite - Renamed to Pyrosmalite-(Mn) by Mineralogical Record, v39 (2008), p 131