Mineralogy Database

Holtstamite Mineral Data

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General Holtstamite Information

Help on Chemical  Formula: Chemical Formula: Ca3(Al,Mn+++)2(SiO4)2(OH)4
Help on Composition: Composition: Molecular Weight = 455.40 gm
   Calcium    26.40 %  Ca   36.94 % CaO
   Manganese   8.20 %  Mn   11.79 % Mn2O3
   Aluminum    5.63 %  Al   10.63 % Al2O3
   Iron        4.54 %  Fe    6.49 % Fe2O3
   Silicon    12.33 %  Si   26.39 % SiO2
   Hydrogen    0.88 %  H     7.83 % H2O
   Oxygen     42.02 %  O
             ______        ______ 
             100.00 %      100.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Al0.95Mn3+0.68Fe3+0.37(SiO4)20.99(H4O4)
Help on Environment: Environment: Scarce, rounded grains within vesuvianite. Garnet group, Al-dominant analogue to henritermierite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Wessels mine, Kalahari Mn field, Kuruman Hill, Cape Province, South Africa Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Dr. Dan Holtstam (b. 1963) in honor of his contributions to Swedish mineralogy and specifically of Mn-deposits of the L�ngban type.
Help on Synonym: Synonym: IMA2003-047