Mineralogy Database

Mcgillite Mineral Data

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General Mcgillite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Fe++)8Si6O15(OH)8Cl2
Help on Composition: Composition: Molecular Weight = 1,038.40 gm
   Magnesium   0.47 %  Mg    0.78 % MgO
   Manganese  37.03 %  Mn   47.82 % MnO
   Iron        3.23 %  Fe    4.15 % FeO
   Silicon    16.23 %  Si   34.72 % SiO2
   Hydrogen    0.78 %  H     6.94 % H2O
   Chlorine    6.83 %  Cl    6.83 % Cl
                -   %   Cl   -1.54 % -O=Cl2   
   Oxygen     35.44 %  O
             ______        ______ 
             100.00 %       99.69 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+7Fe2+0.6Mg0.2Si6O15(OH)8Cl2
Help on Environment: Environment: Open space fracture fillings in a manganese-rich section of quartzite and argillite in a metamorphosed Pb-Zn orebody.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: In the Sullivan mine, Kimberley, Kootenay district, British Columbia, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for McGill University, Montreal, Quebec, Canada.
Help on Name Pronunciation: Name Pronunciation: Mcgillite + Pronunciation Say MCGILLITE
Help on Synonym: Synonym: IMA1979-024