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Vulcanite

Year of discovery: 1961 (Good Hope mine, USA), 1961 (Japan)

Locality list: A locality of vulcanite

• CuTe
• [Cu²⁺][Te]^2-

• Class: Telluride

• Cu => Ag: Empressite
• Cu => Hg: Coloradoite
• Cu => Bi: Tsumoite
• Cu => Pb: Altaite

• Te => S: Covellite
• Te => Se: Klockmannite

• Color: Yellowish brown
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Prismatic, Blade
• Twin: Lamellae

• Cleavage: Good (2 planes), Indistinct on {2 planes}
• Hardness: 1-2
• Density: 7.1

• System: Orthorhombic
• Group: mmm, Pmnm
• Lattice: a=3.2, b=4.1, c=6.9

Etymology: Vulcan in Colorado state, USA, the address of Good Hope mine where this mineral was discovered for the first time.