Natropharmacosiderite

natropharmacosiderite

arseniosiderite

pharmacosiderite

scorodite

Images

Formula: Na2Fe3+4(AsO4)3(OH)5.7H2O
Hydrated arsenate, pharmacosiderite group, pharmacosiderite supergroup, forms a series with pharmacosiderite
Specific gravity: 2.79 measured, 2.9 calculated
Crystal system: Isometric
Hardness: 3
Colour: Light green, dull orange; pale green in transmitted light
Environments

Hydrothermal environments

Localities

At the type locality, the Marda oxidised zone, Marda Project, Mount Jackson Goldfield, Yilgarn Shire, Western Australia, natropharmacosiderite occurs as clusters of randomly oriented crystals. Individual crystals are pale green, euhedral cubes without modifying forms, to 0.5 mm in size. Associated minerals include arseniosiderite, arsenopyrite, jarosite, pharmacosiderite, quartz and scorodite (Mindat).

At the María Josefa Mine, Rodalquilar, Níjar, Almería, Andalusia, Spain, natropharmacosiderite has been found (Mindat photo).
Natropharmacosiderite from the María Josefa Mine - Image

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