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Ferroalluaudite Mineral Data
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General Ferroalluaudite Information
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 Chemical Formula: |
NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3 |
| Composition: |
Molecular Weight = 474.99 gm |
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Sodium 5.32 % Na 7.18 % Na2O |
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Calcium 0.84 % Ca 1.18 % CaO |
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Magnesium 1.02 % Mg 1.70 % MgO |
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Manganese 5.78 % Mn 7.47 % MnO |
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Iron 27.04 % Fe 9.08 % FeO / 28.58 % Fe2O3 |
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Phosphorus 19.56 % P 44.83 % P2O5 |
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Oxygen 40.42 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Na1.1Ca0.1Fe2+0.6Mn2+0.5Fe3+1.7Mg0.2(PO4)3 |
| Environment: |
Zoned granitic pegmatites in phosphate nodules. |
| IMA Status: |
Approved IMA 1979 |
| Locality: |
Pleasant Valley Pegmatite and the Helen Beryl mine, near Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data. |
| Name Origin: |
For dominant ferrous iron content and relationship to alluaudite. |
| Synonym: |
Ferro-alluaudite - Renamed Ferroalluaudite by Mineralogical Record, v39 (2008), p131 |
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IMA1987-046a |
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