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Millisite Mineral Data
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General Millisite Information
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 Chemical Formula: |
(Na,K)CaAl6(PO4)4(OH)9•3(H2O) |
| Composition: |
Molecular Weight = 815.98 gm |
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Potassium 1.20 % K 1.44 % K2O |
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Sodium 2.11 % Na 2.85 % Na2O |
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Calcium 4.91 % Ca 6.87 % CaO |
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Aluminum 19.84 % Al 37.49 % Al2O3 |
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Phosphorus 15.18 % P 34.79 % P2O5 |
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Hydrogen 1.85 % H 16.56 % H2O |
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Oxygen 54.90 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.75K0.25CaAl6(PO4)4(OH)9•3(H2O) |
| Environment: |
Found in altered phosphate deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1930 |
| Locality: |
Clay Canyon, Fairfield, Utah County, Utah, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for F. T. Millis of Lehi, Utah, who found the first specimens. |
| Name Pronunciation: |
Millisite + Pronunciation  |
| Synonym: |
Lehiite |
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