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Metavivianite Mineral Data
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General Metavivianite Information
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 Chemical Formula: |
(Fe++3-x,Fe+++x)(PO4)2(OH)x•8-x(H2O), x=0.5 |
| Composition: |
Molecular Weight = 501.10 gm |
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Iron 33.43 % Fe 35.84 % FeO / 7.97 % Fe2O3 |
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Phosphorus 12.36 % P 28.33 % P2O5 |
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Hydrogen 3.12 % H 27.86 % H2O |
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Oxygen 51.09 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Fe2+2.5Fe3+0.5(PO4)2(OH)0.5•7.5(H2O) |
| Environment: |
Oxidized and dehydrated compared to vivianite. |
| IMA Status: |
Approved IMA 1974 |
| Locality: |
Big Chief pegmatite, Glendale, Pennington County, South Dakota, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named to reflect the relationship with vivianite. |
| Name Pronunciation: |
Metavivianite + Pronunciation  |
| Synonym: |
Egueiite - a hydrous Ca-Fe phosphate, possibly altered metavivianite |
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ICSD 201137 |
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Kertschenite |
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Oxykertschenite |
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PDF 26-1137 |
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