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Tennantite-(Fe) [abbr. Tnt ]

Year of discovery: 1819 (Cornwall, UK), 1896 (Japan)

Locality list: A locality of tennantite-(Fe)

• Cu₁₀Fe₂As₄S₁₃
• (Cu,Ag,Fe,Zn)₁₂As₄S₁₃
• [Cu⁺₆][Cu⁺₄][Fe²⁺₂][As³⁺₄][S₁₂|S]^26-

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

• Cu₁₀Fe₂ => Ag₁₀Zn₂: Argentotennantite

• Fe => Zn: Tennantite-(Zn)
• Fe => Cu: Tennantite-(Cu)

• As => Sb: Tetrahedrite-(Fe) (Series)

• S => Se: Giraudite

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

• Habit: Tetrahedral
• Twin: [111] on {111}, contact and penetration

• Cleavage: No
• Hardness: 3-4.5
• Density: 4.6

• System: Cubic
• Group: (-4)3m, I(-4)3m
• Lattice: a=10.2

Etymology: Smithson Tennant (1761-1815), English chemist

Invalid synonym: Tennantite