Parahopeite

minerals

tarbuttite

hopeite

scholzite

Images
Formula: Zn3(PO4)2.4H2O
Hydrated normal phosphate, hopeite group, triclinic paramorph of hopeite, which is orthorhombic
Specific gravity: 3.31
Hardness: 3½
Streak: White
Colour: Colourless; colourless in transmitted light
Environments

Hydrothermal environments

Parahopeite is a secondary mineral in the oxidised zone of some zinc-bearing hydrothermal mineral deposits, associated with hemimorphite, tarbuttite, hopeite, scholzite, spencerite and pyromorphite (HOM).

Localities

At Reaphook Hill, Martins Well, South Flinders Ranges, Flinders Ranges, South Australia, parahopeite is associated with scholzite, chalcophanite, gypsum and hemimorphite (Dana).

At Hudson Bay mine, Salmo, Nelson district, British Columbia, Canada, parahopeite is associated with hopeite, spencerite and hemimorphite (Dana).

At the type locality, the Kabwe Mine, Kabwe District, Central Province, Zambia, parahopeite is a rare mineral that has been found on tarbuttite resting on limonite, and also on limonite with a few crystals of pyromorphite on the back of the specimen, but the most abundant occurrence of parahopeite here is as crystals on the surface of hopeite. In some cases, the development of acicular parahopeite on hopeite forms complete epimorphic crusts (R&M 94.2.130-131). It is also associated with hemimorphite (Mindat).

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