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Kenoargentotetrahedrite-(Fe)

Year of discovery: 1853 (Reiche Zeche mine, Germany), 1934 (Japan)

Locality list: 52 localities of kenoargentotetrahedrite-(Fe)

• Ag₆Cu₄Fe₂Sb₄S₁₂
• (Ag,Cu)₆Cu₄Fe₂(Sb,As)₄S₁₂
• [Ag⁺₆][Cu⁺₄][Fe²⁺₂][Sb³⁺₄][S₁₂|[]]^26-

• Class: Freibergite series < Tetrahedrite group < Cu sulfosalts < Sulfosalt class
• Class: Sulfosalt

• Ag => Cu: Tetrahedrite-(Fe) (Series)

• Sb => As: Argentotennantite (Series)

• [] => S: Argentotetrahedrite-(Fe)

• Color: Gray, Black
• Streak: Reddish black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Tetrahedral
• Aggregate: Massive

• Cleavage: No
• Hardness: 3.5-4
• Density: 4.9

• System: Cubic
• Group: (-4)3m, I(-4)3m
• Lattice: a=10.6

Etymology: Ag-rich tetrahedrite, which has been known for long at Freiberg, Germany

Invalid synonym: Freibergite