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Chapmanite Mineral Data
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General Chapmanite Information
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 Chemical Formula: |
Sb+++Fe+++2(SiO4)2(OH) |
| Composition: |
Molecular Weight = 434.62 gm |
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Iron 25.70 % Fe 36.74 % Fe2O3 |
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Silicon 12.92 % Si 27.65 % SiO2 |
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Antimony 28.01 % Sb 33.54 % Sb2O3 |
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Hydrogen 0.23 % H 2.07 % H2O |
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Oxygen 33.13 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
SbFe3+2(SiO4)2(OH) |
| Environment: |
Intimately associated with silver ores. Antimomy analog to bismutoferrite. |
| IMA Status: |
Valid Species (Pre-IMA) 1924 |
| Locality: |
Keeley Mine is South Lorrain near Cobalt, Ontaario, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the Canadian mineralogist, E. J. Chapman (1821-1904). |
| Synonym: |
ICSD 87100 |
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PDF 11-135 |
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