[ Top ] [ Japanese ]

Tetrahedrite-(Fe) [abbr. Ttr ]

Year of discovery: 1845 (Copiapó, Chile), 1891 (Japan)

Locality list: A locality of tetrahedrite-(Fe)

• Cu₁₀Fe₂Sb₄S₁₃
• (Cu,Fe,Ag,Zn)₁₂Sb₄S₁₃
• [Cu⁺₆][Cu⁺₄][Fe²⁺₂][Sb³⁺₄][S₁₂|S]^26-

• Class: Tetrahedrite series < Tetrahedrite group < Cu sulfosalts < Sulfosalt class
• Class: Sulfosalt
• Variety: Schwazite (+Hg)
• Insoluble in: HCl
• Substitution pseudomorph: Replaced by Malachite or Oxyplumboroméite (Oxyplumboromeite).

• Cu₆ => Ag₆: Argentotetrahedrite-(Fe) (Series)

• Fe => Zn: Tetrahedrite-(Zn)
• Fe => Mn: Tetrahedrite-(Mn)

• Sb => As: Tennantite-(Fe) (Series)

• Color: Dark gray, Grayish black
• Tarnish: Black with a blue tint
• Streak: Black, Dark gray
• Luster: Metallic
• Diaphaneity: Opaque

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

• Cleavage: No
• Hardness: 3.5-4
• Density: 5.0

• System: Cubic
• Group: (-4)3m, I(-4)3m
• Lattice: a=10.4

Etymology: Tetrahedral morphology