Cassidyite

cassidyite

reevesite

maghemite

lipscombite

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Formula: Ca₂Ni(PO₄)₂.2H₂O
Hydrated normal phosphate, fairfieldite group
Crystal System: Triclinic
Specific gravity: 3.15 calculated
Hardness: 3½
Colour: Pale green to bright green.
Environments

Meteorites

Cassidyite was approved in 1966, but to date (March 2023) it has been reported only from the type locality.

Localities

At the type locality, the Wolfe Creek meteorite crater, Carranya Station, Halls Creek Shire, Western Australia, cassidyite occurs as thin crusts and small spherules in cavities and cracks in the extremely weathered meteorite. Associated minerals include reevesite, goethite, maghemite, jarosite, apatite and lipscombite (AM.52.1190-1197).

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