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Sperrylite

Year of discovery: 1889 (Vermilion mine, Canada), 1976 (Japan)

Locality list: 2 localities of sperrylite

• PtAs₂
• [Pt⁴⁺][As₂]^4-

• Class: Pyrite group
• Class: Arsenide
• Soluble in: HCl

• Pt => Cu: Paxite
• Pt => Co: Safflorite, Clinosafflorite
• Pt => Fe: Löllingite (Lollingite)
• Pt => Os: Omeiite
• Pt => Ru: Anduoite
• Pt => Ni: Rammelsbergite, Pararammelsbergite, Krutovite

• As => Sb: Geversite
• As => Bi: Insizwaite
• As => (As,S): Platarsite

• Color: Silver white
• Streak: Dark gray, Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Cube, Cubo-octahedral

• Cleavage: Indistinct on {001} (3 plane)
• Hardness: 6-7
• Density: 10.6

• System: Cubic
• Group: m3, Pa3
• Lattice: a=6.0

Etymology: Francis Louis Sperry (1861-1906), Canadian chemist who found this mineral for the first time.