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Ferri-ferrotschermakite Mineral Data
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General Ferri-ferrotschermakite Information
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 Chemical Formula: |
[ ]Ca2(Fe2+)3(Fe3+)2(Si6Al2)O22(OH)2 |
| Composition: |
Molecular Weight = 967.87 gm |
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Calcium 8.28 % Ca 11.59 % CaO |
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Aluminum 5.58 % Al 10.53 % Al2O3 |
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Iron 28.85 % Fe 22.27 % FeO / 16.50 % Fe2O3 |
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Silicon 17.41 % Si 37.25 % SiO2 |
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Hydrogen 0.21 % H 1.86 % H2O |
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Oxygen 39.67 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Fe2+3Fe3+2Si6Al2O22(OH)2 |
| IMA Status: |
Approved IMA 1997 (Dana # Added) |
| Locality: |
Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition and for Gustav Tschermak von Sessenegg (1836-1927), Austrian mineralogist. |
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