Mineralogy Database

Sturmanite Mineral Data

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General Sturmanite Information

Help on Chemical  Formula: Chemical Formula: Ca6(Fe+++,Al,Mn++)2(SO4)2[B(OH)4](OH)12•25(H2O)
Help on Composition: Composition: Molecular Weight = 1,265.59 gm
   Calcium    19.00 %  Ca   26.59 % CaO
   Manganese   1.30 %  Mn    1.68 % MnO
   Aluminum    1.28 %  Al    2.42 % Al2O3
   Iron        5.30 %  Fe    7.57 % Fe2O3
   Boron       0.85 %  B     2.75 % B2O3
   Hydrogen    5.26 %  H    46.97 % H2O
   Sulfur      5.07 %  S    12.65 % SO3
   Oxygen     61.95 %  O
             ______        ______ 
             100.00 %      100.63 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca6Fe3+1.2Al0.6Mn2+0.3(SO4)2B(OH)16�25(H2O)
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Black Rock mine, Kuruman district, Cape Province, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for B. Darko Sturman (1937-), Canadian mineralogist, Royal Ontario Museum, Toronto, Canada.
Help on Name Pronunciation: Name Pronunciation: Sturmanite + Pronunciation Say STURMANITE
Help on Synonym: Synonym: IMA1981-011