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Osumilite-(Mg) Mineral Data
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General Osumilite-(Mg) Information
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 Chemical Formula: |
(K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30 |
| Composition: |
Molecular Weight = 1,015.74 gm |
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Potassium 2.89 % K 3.48 % K2O |
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Sodium 0.57 % Na 0.76 % Na2O |
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Magnesium 3.59 % Mg 5.95 % MgO |
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Aluminum 13.95 % Al 26.35 % Al2O3 |
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Iron 6.87 % Fe 3.54 % FeO / 5.90 % Fe2O3 |
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Silicon 24.89 % Si 53.24 % SiO2 |
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Oxygen 47.25 % O |
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______ ______ |
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100.00 % 99.21 % = TOTAL OXIDE |
| Empirical Formula: |
K0.75Na0.25Mg1.5Fe2+0.5Al2.25Fe3+0.75Si9Al3O30 |
| IMA Status: |
Approved IMA 1983 |
| Locality: |
Historic province of Osumi in Sakkabira, Kyushu, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality and the composition. |
| Name Pronunciation: |
Osumilite-(Mg) + Pronunciation  |
| Synonym: |
ICSD 202731 |
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PDF 30-942 |
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