Formula: CuTe
Origin of name: after locality Vulcan, Gunnison Co., Colorado, U.S.A.
Crystal system: Orthorhombic
Crystal class: 2//m 2/m 2/m
Twinning: Common, very thin twin lamellae at approximately 45° to the prominent cleavage in some grains
Unit cell: a = 4.09, b = 6.95, c = 3.15
Colour: Light bronze to yellow-bronze
Diaphaneity: Opaque
Luster: Metallic
Habit: Irregular grains prismatic or blade-like, tabular, in aggregates, massive, crystals are usually twinned
Hardness: 1 to 2
Specific gravity: 7.1
Cleavage: 2; one prominent, one less prominent (both probably pinacoidal)
Tenacity: Sectile
Streak:
Synonyms/varieties:
Comments:
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