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Modderite Mineral Data
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General Modderite Information
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 Chemical Formula: |
(Co,Fe)As |
| Composition: |
Molecular Weight = 133.08 gm |
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Iron 10.49 % Fe |
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Cobalt 33.21 % Co |
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Arsenic 56.30 % As |
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______ |
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100.00 % |
| Empirical Formula: |
Co0.75Fe2+0.25As |
| Environment: |
In heavy mineral concentrates. |
| IMA Status: |
Valid Species (Pre-IMA) 1924 |
| Locality: |
Modderfontein mine, Witwatersrand, Transvaal, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Modderite + Pronunciation  |
| Synonym: |
ICSD 48026 |
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PDF Sep-94 |
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