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Ferri-ferrobarroisite Mineral Data
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General Ferri-ferrobarroisite Information
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 Chemical Formula: |
[ ]CaNa(Fe++)3(Fe+++)2(Si7Al)O22(OH)2 |
| Composition: |
Molecular Weight = 951.88 gm |
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Sodium 2.42 % Na 3.26 % Na2O |
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Calcium 4.21 % Ca 5.89 % CaO |
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Aluminum 2.83 % Al 5.36 % Al2O3 |
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Iron 29.33 % Fe 22.64 % FeO / 16.78 % Fe2O3 |
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Silicon 20.65 % Si 44.19 % SiO2 |
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Hydrogen 0.21 % H 1.89 % H2O |
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Oxygen 40.34 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaNaFe2+3Fe3+2(Si7AlO22)(OH)2 |
| IMA Status: |
Proposed IMA 1997 (Dana # Added) |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). |
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