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Welinite-III Mineral Data
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General Welinite-III Information
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 Chemical Formula: |
Mn++6(W++++++,Mg)2Si2(O,OH)14 |
| Composition: |
Molecular Weight = 899.73 gm |
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Magnesium 1.35 % Mg 2.24 % MgO |
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Manganese 36.64 % Mn 47.31 % MnO |
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Silicon 6.24 % Si 13.36 % SiO2 |
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Hydrogen 0.22 % H 2.00 % H2O |
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Tungsten 30.65 % W 38.65 % WO3 |
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Oxygen 24.90 % O |
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______ ______ |
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100.00 % 103.56 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+6W1.5Mg0.5Si2O12(OH)2 |
| Environment: |
Fillings in fessures with other minerals cutting hausmannite ore. |
| IMA Status: |
Approved IMA 1967 |
| Locality: |
Langban, Varmland, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Eric Welin, mineralogist and geochronologist, Swedish Museum of Natural History, Stockholm, Sweden. |
| Name Pronunciation: |
Welinite-III  |
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