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Ferrohornblende Mineral Data
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General Ferrohornblende Information
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 Chemical Formula: |
[ ]Ca2[Fe++4(Al,Fe+++)]Si7AlO22(OH)2 |
| Composition: |
Molecular Weight = 947.32 gm |
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Calcium 8.46 % Ca 11.84 % CaO |
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Aluminum 4.98 % Al 9.42 % Al2O3 |
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Iron 25.05 % Fe 30.34 % FeO / 2.11 % Fe2O3 |
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Silicon 20.75 % Si 44.40 % SiO2 |
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Hydrogen 0.21 % H 1.90 % H2O |
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Oxygen 40.53 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca2Fe2+4Al0.75Fe3+0.25(Si7AlO22)(OH)2 |
| Environment: |
From granites, granodiorites, and metabasalts; common in amphibolites and schists. Forms a series with magnesiohornblende. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Common worldwide. Link to MinDat.org Location Data. |
| Name Origin: |
For its ferrous iron content and from the German for horn and to deceive, in allusion to its similarity to valuable minerals in ores. |
| Name Pronunciation: |
Ferrohornblende + Pronunciation  |
| Synonym: |
Aluminoferrohornblende |
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Barkevicite |
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Hornblende |
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ICSD 68063 |
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Istisuite |
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Oxyhornblende |
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PDF 44-1478 |
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