| |
 |
Natropharmacosiderite Mineral Data
|
|
|
General Natropharmacosiderite Information
|
 Chemical Formula: |
(Na,K)2Fe+++4(AsO4)3(OH)5•7(H2O) |
| Composition: |
Molecular Weight = 902.63 gm |
| |
Potassium 2.17 % K 2.61 % K2O |
| |
Sodium 4.33 % Na 5.84 % Na2O |
| |
Iron 24.75 % Fe 35.38 % Fe2O3 |
| |
Arsenic 24.07 % As 36.92 % As2O5 |
| |
Hydrogen 2.14 % H 19.16 % H2O |
| |
Oxygen 42.54 % O |
| |
______ ______ |
| |
100.00 % 99.91 % = TOTAL OXIDE |
| Empirical Formula: |
Na1.7K0.5Fe3+4(AsO4)2.9(OH)5.6•6.8(H2O) |
| Environment: |
Found on a museum specimen, presumably an alteration product of arsenopyrite. |
| IMA Status: |
Approved IMA 1985 |
| Locality: |
Marda, Western Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the sodium in the composition and its relationship to pharmacosiderite. |
| Synonym: |
Sodium pharmacosiderite - Renamed to Natropharmacosiderite by Mineralogical Record, v39 (2008), p131 |
| |