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Welinite-VIII Mineral Data
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General Welinite-VIII Information
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 Chemical Formula: |
(Mn++,Mg)3(W++++++,Mn+++)1-x(SiO4)(O,OH)3 (x=1/3) |
| Composition: |
Molecular Weight = 402.69 gm |
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Magnesium 1.21 % Mg 2.00 % MgO |
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Manganese 40.93 % Mn 52.85 % MnO |
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Silicon 6.97 % Si 14.92 % SiO2 |
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Hydrogen 0.25 % H 2.24 % H2O |
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Tungsten 22.83 % W 28.79 % WO3 |
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Oxygen 27.81 % O |
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______ ______ |
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100.00 % 100.79 % = TOTAL OXIDE |
| Empirical Formula: |
Mn2+3W0.5Mg0.2SiO6(OH) |
| Environment: |
In small amounts, as fillings in fissures with other mineral 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-VIII  |
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