Vulcanite

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This article is about the mineral vulcanite. For vulcanized rubber, see ebonite. For artificial stone, see artificial stone.
Vulcanite
General
Category Telluride mineral
Formula
(repeating unit)
CuTe
Strunz classification 02.CB.75
Identification
Color Pale to yellow bronze
Crystal habit Massive, granular, tabular
Crystal system Orthorhombic - Dipyramidal (2/m 2/m 2/m)
Twinning Common
Cleavage [hk0] Good, [h0l] Indistinct
Fracture Sectile - Curved shavings or scrapings produced by a knife blade
Mohs scale hardness 1 - 2
Luster Metallic
Diaphaneity Opaque
Specific gravity 7.1
Pleochroism Very strong, bright yellow to blue-gray
Fusibility 1.5
References [1][2][3]

Vulcanite is a rare copper telluride mineral. The mineral has a metallic luster, and is a green or bronze-yellow shade. It has a hardness between 1 and 2 on the Mohs scale (between talc and gypsum). Its crystal structure is orthorhombic.

It is named after the place where it was discovered in 1961, the Mammoth Good Hope Mine in Vulcan, Gunnison County, Colorado, USA.[3] Small deposits have also been discovered in Japan, Russia, Saudi Arabia, and Norway. It occurs with native tellurium, rickardite, petzite and sylvanite.

References[edit]