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Tassieite Mineral Data
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General Tassieite Information
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 Chemical Formula: |
(Na,[ ])Ca2(Mg,Fe++,Fe+++)2(Fe+++,Mg)2(Fe++,Mg)2(PO4)6(H2O)2 |
| Composition: |
Molecular Weight = 955.32 gm |
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Sodium 1.44 % Na 1.95 % Na2O |
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Calcium 8.22 % Ca 11.51 % CaO |
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Yttrium 0.19 % Y 0.24 % Y2O3 |
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Ytterbium 0.18 % Yb 0.21 % Yb2O3 |
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Magnesium 6.59 % Mg 10.93 % MgO |
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Manganese 0.29 % Mn 0.37 % MnO |
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Iron 19.70 % Fe 14.89 % FeO / 11.62 % Fe2O3 |
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Phosphorus 19.39 % P 44.43 % P2O5 |
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Hydrogen 0.42 % H 3.77 % H2O |
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Sulfur 0.03 % S 0.08 % SO3 |
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Oxygen 43.54 % O |
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______ ______ |
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100.00 % 99.98 % = TOTAL OXIDE |
| Empirical Formula: |
Na0.6Ca1.96Mg2.59Mn2+0.05Fe2+1.98Fe3+1.39Y0.02Yb0.01S0.01P5.98O24�2(H2O) |
| Environment: |
Secondary mineral in a nodule of fluoroapatite in a bioitite-quartz-plagioclase paragneiss. Wicksite group. |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Johnston Fjord, Stornes Peninsula, Larsemann Hills, Prydz Bay, East Antarctica Link to MinDat.org Location Data. |
| Name Origin: |
Named for Tassie Tarn, a nearby lake at the locality. |
| Synonym: |
IMA2005-051 |
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