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Jahnsite-(CaMnFe) Mineral Data
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General Jahnsite-(CaMnFe) Information
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 Chemical Formula: |
CaMn++Fe++2Fe+++2(PO4)4(OH)2•8(H2O) |
| Composition: |
Molecular Weight = 876.43 gm |
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Calcium 4.57 % Ca 6.40 % CaO |
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Manganese 6.27 % Mn 8.09 % MnO |
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Iron 25.49 % Fe 16.40 % FeO / 18.22 % Fe2O3 |
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Phosphorus 14.14 % P 32.39 % P2O5 |
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Hydrogen 2.07 % H 18.50 % H2O |
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Oxygen 47.46 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaMn2+Fe2+2Fe3+2(PO4)4(OH)2•8(H2O) |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
Fletcher mine, North Groton, New Hampsire, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Richard H. Jahns (1915-1983), mineralogist and pegmatite expert, Stanford University, Palo Alto, California, USA. |
| Name Pronunciation: |
Jahnsite-(CaMnFe)  |
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