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Formula: PtS
Sulphide of platinum,
paramorph of
cooperite, forms a series with
vysotskite
Crystal System: Tetragonal
Specific gravity: 9.63 measured, 9.383 calculated
Hardness: 5
Colour: Steel-grey
Common impurities: Ni
Environments
Braggite occurs in norites occurring in layered mafic intrusives,
formed at high magmatic temperatures
(Webmin).
Localities
At the type locality, Mokopane, Mogalakwena, Waterberg District, Limpopo, South Africa, braggite is associated with
sperrylite, cooperite,
laurite and platinum
(HOM).
At the Stillwater Complex, Montana, USA, braggite is associated with
pentlandite, pyrrhotite,
chalcopyrite, cubanite,
nickel-bearing mackinawite,
gold, cooperite,
vysotskite, moncheite,
isoferroplatinum, kotulskite,
keithconnite and
palladium-bearing tulameenite
(HOM).
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