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Poldervaartite Mineral Data
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General Poldervaartite Information
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 Chemical Formula: |
(Ca,Mn++)2SiO3(OH)2 |
| Composition: |
Molecular Weight = 197.68 gm |
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Calcium 30.41 % Ca 42.55 % CaO |
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Manganese 13.90 % Mn 17.94 % MnO |
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Silicon 14.21 % Si 30.39 % SiO2 |
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Hydrogen 1.02 % H 9.11 % H2O |
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Oxygen 40.47 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca1.5Mn2+0.5SiO3(OH)2 |
| Environment: |
In a pocket in massive manganese ores in a bedded manganese ore deposit. |
| IMA Status: |
Approved IMA 1993 |
| Locality: |
Wessels mine, near Kuruman, Cape Province, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Arie Poldervaart (1918-1964), Professor of Petrology, Columbia University, New York City, New York, USA. |
| Name Pronunciation: |
Poldervaartite + Pronunciation  |
| Synonym: |
ICSD 74005 |
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IMA1992-012 |
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PDF 46-1435 |
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