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Chalcostibite

Year of discovery: 1847 (Graf Jost-Christian mine, Germany), 1954 (Japan)

Locality list: 5 localities of chalcostibite

• CuSbS₂
• [Cu⁺][Sb³⁺][S₂]^4-

• Class: Emplectite group < Binary sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Sb => Fe: Chalcopyrite
• Sb => Ga: Gallite
• Sb => In: Roquesite
• Sb => Bi: Emplectite

• Color: Lead gray-Iron black
• Tarnish: Blue, Green
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Thin platy on {010}
• Twin: {104}

• Cleavage: Perfect on {010} (1 plane), Good on {001} and {100} (2 planes)
• Hardness: 3-4
• Density: 5.0

• System: Orthorhombic
• Group: mmm, Pnam
• Lattice: a=6.0, b=14.5, c=3.8

Etymology: Chalkos (copper) - stibium (antimony) in Greek