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Hocartite

Year of discovery: 1967 (Chocaya mine, Bolivia), 1977 (Japan)

Locality list: 3 localities of hocartite

• Ag₂FeSnS₄
• Ag₂(Fe,Zn)SnS₄
• [Ag⁺₂][Fe²⁺][Sn⁴⁺][S₄]^8-

• Class: Stannite group
• Class: Sulfide

• Ag => Cu: Stannite, Ferrokësterite (Ferrokesterite)

• Fe => Zn: Pirquitasite (Series)

• Color: Brownish gray
• Luster: Metallic
• Diaphaneity: Opaque

• Cleavage: Perfect on {100} (2 planes)
• Hardness: 4
• Density: 4.8

• System: Tetragonal
• Group: (-4)2m, I(-4)2m
• Lattice: a=5.7, c=11.0

Etymology: Prof. Raymond Hocart, French mineralogist