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Jahnsite-(NaMnMg) Mineral Data
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General Jahnsite-(NaMnMg) Information
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 Chemical Formula: |
NaMnMg2Fe+++2(PO4)4(OH)2•8H2O |
| Composition: |
Molecular Weight = 796.25 gm |
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Sodium 2.89 % Na 3.89 % Na2O |
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Magnesium 6.10 % Mg 10.12 % MgO |
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Manganese 6.90 % Mn 8.91 % MnO |
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Iron 14.03 % Fe 20.06 % Fe2O3 |
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Phosphorus 15.56 % P 35.65 % P2O5 |
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Hydrogen 2.28 % H 20.36 % H2O |
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Oxygen 52.24 % O |
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______ ______ |
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100.00 % 99.00 % = TOTAL OXIDE |
| Empirical Formula: |
NaMn2+Mg2Fe3+2(PO4)4(OH)2•8(H2O) |
| Environment: |
Zoned tip on Jahnsite-(NaFeMg). Whiteite-jahnsite group. |
| IMA Status: |
Not Submitted IMA (Dana # Added) |
| Locality: |
Tip Top mine, Custer County, South Dakota, 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-(NaMnMg)  |
| Synonym: |
IMA2007-016 |
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