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Masutomilite Mineral Data
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General Masutomilite Information
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 Chemical Formula: |
K(Li,Al,Mn++)3[(Si,Al)4O10](F,OH)2 |
| Composition: |
Molecular Weight = 402.17 gm |
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Potassium 9.72 % K 11.71 % K2O |
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Lithium 3.45 % Li 7.43 % Li2O |
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Manganese 6.83 % Mn 8.82 % MnO |
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Aluminum 10.06 % Al 19.01 % Al2O3 |
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Silicon 20.95 % Si 44.82 % SiO2 |
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Hydrogen 0.13 % H 1.12 % H2O |
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Oxygen 41.77 % O |
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Fluorine 7.09 % F 7.09 % F |
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- %
F -2.98 % -O=F2 |
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______ ______ |
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100.00 % 97.02 % = TOTAL OXIDE |
| Empirical Formula: |
KLi2Al0.5Mn2+0.5Si3AlO10F1.5(OH)0.5 |
| Environment: |
Li pegmatites. |
| IMA Status: |
Approved IMA 1975 |
| Locality: |
Tanakamiyama district, Shiga Prefecture, Honshu, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Kazunosuke Masutomi, Japanese pharmacist and prominent amateur mineralogist and mineral collector. |
| Name Pronunciation: |
Masutomilite + Pronunciation  |
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