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Sarmientite Mineral Data
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General Sarmientite Information
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 Chemical Formula: |
Fe+++2(AsO4)(SO4)(OH)•5(H2O) |
| Composition: |
Molecular Weight = 453.76 gm |
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Iron 24.62 % Fe 35.19 % Fe2O3 |
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Arsenic 16.51 % As 25.33 % As2O5 |
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Hydrogen 2.44 % H 21.84 % H2O |
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Sulfur 7.07 % S 17.64 % SO3 |
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Oxygen 49.36 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Fe3+2(AsO4)(SO4)(OH)•5(H2O) |
| Environment: |
Rare mineral in oxidized pyritic veins in diabase. |
| IMA Status: |
Valid Species (Pre-IMA) 1941 |
| Locality: |
Santa Elena mine, Quebrada de La Alcaparrosa, between San Juan and Calingasta, San Juan Province, Argentina. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Domingo Faustino Sarmiento (1811-1888), former President of Argentina. |
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