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Ferrowinchite Mineral Data
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General Ferrowinchite Information
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 Chemical Formula: |
[ ](CaNa)Fe++4(Al,Fe+++)Si8O22(OH)2 |
| Composition: |
Molecular Weight = 931.34 gm |
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Sodium 2.47 % Na 3.33 % Na2O |
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Calcium 4.30 % Ca 6.02 % CaO |
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Aluminum 2.17 % Al 4.11 % Al2O3 |
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Iron 25.48 % Fe 30.86 % FeO / 2.14 % Fe2O3 |
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Silicon 24.12 % Si 51.61 % SiO2 |
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Hydrogen 0.22 % H 1.93 % H2O |
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Oxygen 41.23 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaNaFe2+4Al0.75Fe3+0.25(Si8O22)(OH)2 |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition and for Howard J. Winch, Geological survey of India. |
| Name Pronunciation: |
Ferrowinchite + Pronunciation  |
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