Mineralogy Database

Geigerite Mineral Data

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General Geigerite Information

Help on Chemical  Formula: Chemical Formula: Mn5(AsO3OH)2(AsO4)2•10(H2O)
Help on Composition: Composition: Molecular Weight = 1,012.54 gm
   Manganese  27.13 %  Mn   35.03 % MnO
   Arsenic    29.60 %  As   45.40 % As2O5
   Hydrogen    2.19 %  H    19.57 % H2O
   Oxygen     41.08 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5(AsO3OH)2(AsO4)2•10(H2O)
Help on Environment: Environment: Cavities in radiolarites, formed by metamorphism of manganese oxide ores.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Falotta mine, Oberhalbstein, Graub´┐Żunden, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Thomas Geiger (1886-1976), Wiesendangen, Switzerland, who studied Falotta manganese ores.
Help on Name Pronunciation: Name Pronunciation: Geigerite + Pronunciation Say GEIGERITE
Help on Synonym: Synonym: ICSD 68637
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