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Johnsomervilleite Mineral Data
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General Johnsomervilleite Information
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 Chemical Formula: |
Na2Ca(Mg,Fe++,Mn)7(PO4)6 |
| Composition: |
Molecular Weight = 955.37 gm |
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Sodium 3.37 % Na 4.54 % Na2O |
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Calcium 4.61 % Ca 6.46 % CaO |
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Magnesium 7.89 % Mg 13.08 % MgO |
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Manganese 4.03 % Mn 5.20 % MnO |
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Iron 20.46 % Fe 26.32 % FeO |
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Phosphorus 19.45 % P 44.57 % P2O5 |
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Oxygen 40.19 % O |
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______ ______ |
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100.00 % 100.17 % = TOTAL OXIDE |
| Empirical Formula: |
Na1.4Ca1.1Fe2+3.5Mg3.1Mn2+0.7(PO4)6 |
| Environment: |
Accessory mineral in podiform metamorphic segregations in kyanite-sillimanite-grade gneiss. |
| IMA Status: |
Approved IMA 1980 |
| Locality: |
Glen Cosaidh, Loch Quoich,, Inverness-shire, Scotland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for John M. Somerville (1908-1978), who collected the first specimen. |
| Name Pronunciation: |
Johnsomervilleite + Pronunciation  |
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