Mineralogy Database

Grischunite Mineral Data

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General Grischunite Information

Help on Chemical  Formula: Chemical Formula: NaCa2Mn++5Fe+++(AsO4)6•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,303.23 gm
   Sodium      1.76 %  Na    2.38 % Na2O
   Calcium     6.15 %  Ca    8.61 % CaO
   Manganese  21.08 %  Mn   27.22 % MnO
   Iron        4.29 %  Fe    6.13 % Fe2O3
   Arsenic    34.49 %  As   52.91 % As2O5
   Hydrogen    0.31 %  H     2.76 % H2O
   Oxygen     31.92 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa2Mn2+5Fe3+(AsO4)6•2(H2O)
Help on Environment: Environment: Alteration product of sarkinite in a manganese deposit.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Falotta mine, Oberhalbstein, Graub´┐Żunden, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the former Romansch name Grischun for Graubunden Canton.
Help on Name Pronunciation: Name Pronunciation: Grischunite + Pronunciation Say GRISCHUNITE
Help on Synonym: Synonym: ICSD 63431
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