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Jahnsite-(CaMnMn) Mineral Data
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General Jahnsite-(CaMnMn) Information
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 Chemical Formula: |
CaMn++Mn++2Fe+++2(PO4)4(OH)2•8(H2O) |
| Composition: |
Molecular Weight = 874.61 gm |
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Calcium 4.58 % Ca 6.41 % CaO |
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Manganese 18.84 % Mn 24.33 % MnO |
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Iron 12.77 % Fe 18.26 % Fe2O3 |
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Phosphorus 14.17 % P 32.46 % P2O5 |
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Hydrogen 2.07 % H 18.54 % H2O |
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Oxygen 47.56 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
CaMn2+Mn2+2Fe3+2(PO4)4(OH)2•8(H2O) |
| IMA Status: |
Approved IMA 1990 |
| Locality: |
Mangualde pegmatite, Beira, Portugal. 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-(CaMnMn)  |
| Synonym: |
IMA1987-020 |
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