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Tamaite Mineral Data
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General Tamaite Information
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 Chemical Formula: |
(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112•21(H2O) |
| Composition: |
Molecular Weight = 4,822.34 gm |
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Potassium 0.69 % K 0.83 % K2O |
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Barium 1.85 % Ba 2.07 % BaO |
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Sodium 0.26 % Na 0.35 % Na2O |
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Calcium 1.37 % Ca 1.92 % CaO |
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Manganese 27.34 % Mn 35.30 % MnO |
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Aluminum 4.03 % Al 7.61 % Al2O3 |
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Silicon 19.10 % Si 40.87 % SiO2 |
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Hydrogen 1.23 % H 10.96 % H2O |
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Oxygen 44.13 % O |
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______ ______ |
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100.00 % 99.92 % = TOTAL OXIDE |
| Empirical Formula: |
Ca1.65K0.85Ba0.65Na0.55Mn2+24Si32.8Al7.2O95.3(OH)16.7�21(H2O) |
| Environment: |
Veinlets in weakly metamorphosed Mn ore deposit. Ca analog of Ganophyllite. |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
Shiromaru mine, Okutama, Tama district, about 60 km from Tokyo, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA1999-011 |
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