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Alumopharmacosiderite Mineral Data
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General Alumopharmacosiderite Information
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 Chemical Formula: |
KAl4(AsO4)3(OH)4•6•5(H2O) |
| Composition: |
Molecular Weight = 748.91 gm |
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Potassium 5.22 % K 6.29 % K2O |
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Aluminum 14.41 % Al 27.23 % Al2O3 |
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Arsenic 30.01 % As 46.03 % As2O5 |
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Hydrogen 2.29 % H 20.45 % H2O |
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Oxygen 48.07 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KAl4(AsO4)3(OH)4•6.5(H2O) |
| Environment: |
With other oxidized arsenates on a museum specimen. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
From the [Emma Louisa gold mine,] Guanaco district, about 100 km east-northeast of Taltal, Antofagasta, Chile. Link to MinDat.org Location Data. |
| Name Origin: |
As the ALUMinum analog of "pharmacosiderite." |
| Synonym: |
ICSD 76972 |
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PDF 34-670 |
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