Arsenide, pyrite group, platinum-bearing mineral
Crystal System: Isometric
Specific gravity: 10.58 measured, 10.78 calculated
Hardness: 6 to 7
Streak: Dark grey to black
Luminescence: Not fluorescent under UV
Magnetism: Not magnetic
Common impurities: Ir,Rh,Fe,Cu,Sb
Sperrylite is the most widespread platinum mineral, occurring in
every type of deposit
The type locality is the Vermilion mine, Denison Township, Greater Sudbury, Ontario, Canada.
At the Mesamax Northwest deposit, Ungava Peninsula, Nunavik, Nord-du-Québec, Quebec, Canada, sperrylite is one of the associated of naldrettite (the Mesamax deposit is the type locality of naldrettite) (CM 59.6.1801-1820).
At the Xiaonanshan Cu-Ni-(Pt-Pd) deposit, Wuchuan County, Hohhot City, Inner Mongolia, China, sperrylite is associated with leadamalgam, chromite, ilmenite, magnetite, gersdorffite, pyrite, chalcopyrite, violarite, millerite, stibnite, electrum, niggliite, iridosmine, platinum, merenskyite and kotulskite (HOM).
At the Danba pegmatite field, Danba county, Garzê Autonomous Prefecture, Sichuan, China, sperrylite is associated with pyrrhotite, pentlandite, chalcopyrite, violarite, cubanite, bornite, sphalerite, galena, linnaeite, magnetite, testibiopalladite, sudburyite, omeiite, gold and electrum (HOM).
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