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Holtstamite Mineral Data
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General Holtstamite Information
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 Chemical Formula: |
Ca3(Al,Mn+++)2(SiO4)2(OH)4 |
| Composition: |
Molecular Weight = 455.40 gm |
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Calcium 26.40 % Ca 36.94 % CaO |
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Manganese 8.20 % Mn 11.79 % Mn2O3 |
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Aluminum 5.63 % Al 10.63 % Al2O3 |
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Iron 4.54 % Fe 6.49 % Fe2O3 |
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Silicon 12.33 % Si 26.39 % SiO2 |
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Hydrogen 0.88 % H 7.83 % H2O |
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Oxygen 42.02 % O |
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______ ______ |
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100.00 % 100.07 % = TOTAL OXIDE |
| Empirical Formula: |
Ca3Al0.95Mn3+0.68Fe3+0.37(SiO4)20.99(H4O4) |
| Environment: |
Scarce, rounded grains within vesuvianite. Garnet group, Al-dominant analogue to henritermierite. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Wessels mine, Kalahari Mn field, Kuruman Hill, Cape Province, South Africa Link to MinDat.org Location Data. |
| 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. |
| Synonym: |
IMA2003-047 |
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