sperrylite

{{Infobox mineral | name = Sperrylite | category = Arsenide mineral Pyrite group | boxwidth = | image = Sperrylite-195702.jpg | imagesize = 260px | caption = | formula = | IMAsymbol = Spy | strunz = 2.EB.05a | system = Isometric | class = Diploidal (m) H-M symbol: (2/m ) | symmetry = Pa3 | unit cell = a = 5.967 Å, Z = 4 | color = Tin white | habit = Well-formed finely crystalline, massive to reniform | cleavage = Indistinct on {001} | fracture = Conchoidal | tenacity = Brittle | mohs = 6–7 | luster = Metallic | refractive = | pleochroism = | streak = Black | gravity = 10.58 | melt = | solubility = | references = }}

thumb|Sperrylite on chalcopyrite with [[magnetite, Oktyabersky Mine, Norilsk. Field of view 2.2 cm.]] Sperrylite is a platinum arsenide mineral with the chemical formula and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure. It forms cubic, octahedral or pyritohedral crystals in addition to massive and reniform habits. It has a Mohs hardness of 6–7 and a very high specific gravity of 10.6.