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