[ Top ] [ Japanese ]

Stannite

Year of discovery: 1832 (West Wheal Kitty, UK), 1894 (Japan)

Locality list: 65 localities of stannite

• Cu₂FeSnS₄
• Cu₂(Fe,Zn)SnS₄
• [Cu⁺₂][Fe²⁺][Sn⁴⁺][S₄]^8-

• Class: Stannite group
• Class: Sulfide
• Insoluble in: HCl

• Polymorph: Ferrokësterite (Ferrokesterite) (Tetragonal)

• Cu => Ag: Hocartite

• Fe => Cd: Černýite(Cernyite)
• Fe => Zn: Kësterite (Kesterite) (Series)
• Fe => Cu: Kuramite
• Fe => Hg: Velikite

• Color: Greenish gray, Black
• Tarnish: Bluish gray
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Pseudo-octahedral
• Twin: [112] on {102} penetration, {112}

• Cleavage: Indistinct on {110} and {001} (3 planes)
• Hardness: 4
• Density: 4.4

• System: Tetragonal
• Group: (-4)2m, I(-4)2m
• Lattice: a=5.4, c=10.7

Etymology: Stannum (Tin) in Latin