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Ferroferriwinchite Mineral Data
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General Ferroferriwinchite Information
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 Chemical Formula: |
CaNa(Fe++,Mg)4Fe+++[Si8O22](OH)2 |
| Composition: |
Molecular Weight = 921.45 gm |
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Sodium 2.49 % Na 3.36 % Na2O |
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Calcium 4.35 % Ca 6.09 % CaO |
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Magnesium 2.64 % Mg 4.37 % MgO |
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Iron 24.24 % Fe 23.39 % FeO / 8.67 % Fe2O3 |
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Silicon 24.38 % Si 52.17 % SiO2 |
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Hydrogen 0.22 % H 1.96 % H2O |
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Oxygen 41.67 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaNaFe2+3MgFe3+(Si8O22)(OH)2 |
| IMA Status: |
Not Approved IMA |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition and for Howard J. Winch, Geological survey of India. |
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