Penriceite

penriceite

angastonite

minyulite

perhamite

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Formula: [Mg(H2O)6][Na(H2O)2Al3(PO4)2F6].H2O
Hydrated phosphate
Specific gravity: 2.12 calculated
Colour: Colourless, white
Environments

Hydrothermal environments

Penriceite is a new mineral, approved in 2021 and to date (August 2022) reported only from the type locality.

Localities

At the type locality, the Penrice marble quarry, Penrice, Barossa Valley, North Mt Lofty Ranges, South Australia, phosphate-rich areas in a gossanous zone consisting of limonitic and manganiferous clay-rich rocks were located within the marble. Penriceite occurs as rod-like aggregates up to about 100 microns across. Associated minerals include angastonite, minyulite, perhamite, crandallite and fluorapatite. Penriceite crystallised from groundwaters at ambient temperatures and the phosphorus derived by leaching of weakly phosphatic limestones or low-grade primary phosphorites (AJM 23.1.5-12).

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