Mineralogy Database

Olmiite Mineral Data

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General Olmiite Information

Help on Chemical Formula: Chemical Formula: CaMn[SiO3(OH)](OH)
Help on Composition: Composition: Molecular Weight = 203.44 gm
   Calcium    22.65 %  Ca   31.70 % CaO
   Manganese  22.95 %  Mn   29.64 % MnO
   Iron        0.27 %  Fe    0.35 % FeO
   Silicon    13.81 %  Si   29.53 % SiO2
   Hydrogen    0.99 %  H     8.86 % H2O
   Oxygen     39.32 %  O
             ______        ______ 
             100.00 %      100.08 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.15Mn2+0.85Fe2+0.01(SiO3)(OH)2
Help on Environment: Environment: Mn-dominant analogue of poldervaartite
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: N�Chwaning II mine, Kalahari field, Republic of South Africa Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Filippo Olmi, mineralogist at Centre di Studio per la Minerogenesi ela Geochimica Applicata, Florence, Italy
Help on Synonym: Synonym: IMA2006-026