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Osumilite-(Fe) Mineral Data
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General Osumilite-(Fe) Information
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 Chemical Formula: |
(K,Na)(Fe++,Mg)2(Al,Fe+++)3(Si,Al)12O30 |
| Composition: |
Molecular Weight = 1,047.28 gm |
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Potassium 2.80 % K 3.37 % K2O |
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Sodium 0.55 % Na 0.74 % Na2O |
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Magnesium 1.16 % Mg 1.92 % MgO |
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Aluminum 13.53 % Al 25.56 % Al2O3 |
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Iron 12.00 % Fe 10.29 % FeO / 5.72 % Fe2O3 |
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Silicon 24.14 % Si 51.63 % SiO2 |
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Oxygen 45.83 % O |
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______ ______ |
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100.00 % 99.24 % = TOTAL OXIDE |
| Empirical Formula: |
K0.75Na0.25Fe2+1.5Mg0.5Al2.25Fe3+0.75Si9Al3O30 |
| Environment: |
Acidic volcanic rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1953 |
| Locality: |
Historic province of Osumi in Sakkabira, Kyushu, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Osumilite-(Fe) + Pronunciation  |
| Synonym: |
ICSD 202733 |
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Osumilite |
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PDF 25-628 |
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