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Copper telluride mineral From Wikipedia, the free encyclopedia
Vulcanite is a rare copper telluride mineral. The mineral has a metallic luster, and has a green or bronze-yellow tint. It has a hardness between 1 and 2 on the Mohs scale (between talc and gypsum). Its crystal structure is orthorhombic.
Vulcanite | |
---|---|
General | |
Category | Telluride mineral |
Formula (repeating unit) | CuTe |
IMA symbol | Vul[1] |
Strunz classification | 2.CB.75 |
Crystal system | Orthorhombic |
Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
Space group | Pmnm |
Identification | |
Color | Pale to yellow bronze |
Crystal habit | Massive, granular, tabular |
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 | [2][3][4] |
Vulcanite is named for the place where it was discovered in 1961, the Mammoth Good Hope Mine in Vulcan (ghost town and district), Gunnison County, Colorado.[4] Small deposits have also been discovered in Japan, Russia, Saudi Arabia, and Norway. It occurs with native tellurium, rickardite, petzite, and sylvanite.
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