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Pirquitasite

Year of discovery: 1980 (Pirquitas deposit, Argentina), 1979 (Japan)

Locality list: A locality of pirquitasite

• Ag₂ZnSnS₄
• [Ag⁺₂][Zn²⁺][Sn⁴⁺][S₄]^8-

• Class: Stannite group
• Class: Sulfide

• Ag => Cu: Kësterite (Kesterite)

• Zn => Fe: Hocartite (Series)

• Color: Black, Dark gray
• Streak: Grayish brown
• Luster: Metallic
• Diaphaneity: Opaque

• Cleavage: No
• Hardness: 4
• Density: 4.8

• System: Tetragonal
• Group: (-4), I(-4)
• Lattice: a=5.8, c=10.8

Etymology: Pirquitas deposit in Argentina