Brianite

brianite

panethite

whitlockite

schreibersite

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Formula: Na₂CaMg(PO₄)₂
Anhydrous normal phosphate
Crystal System: Monoclinic
Specific gravity: 3.00 to 3.10 measured, 3.13 calculated
Hardness: 4 to 5
Streak: White
Colour: Colourless
Solubility: Insoluble in water
Melting point: Between 800^oC and 1,000^oC
Environments

Meteorites

Localities

The Morasko meteorite, Poznań, Greater Poland Voivodeship, Poland, is host to about 30 different minerals, including brianite, most from various inclusions, enclosed in the kamacite–taenite matrix of the iron meteorite (EJM 28.5.969–977).

At the type locality, the Dayton meteorite, Montgomery county, Ohio, USA, brianite is a very rare component in phosphate nodules in the iron meteorite, occurring as grains up to 0.1-0.2 mm in size in small pockets in the metallic phase. Associated minerals include panethite, whitlockite, albite, enstatite, schreibersite, kamacite, taenite, graphite, sphalerite and troilite (AM 53.508, HOM).

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