Rickardite
| Rickardite | |
|---|---|
Rickardite on tellurium
|
|
| General | |
| Category | Telluride mineral |
|
Formula (repeating unit) |
Cu7Te5 |
| Strunz classification | 2.BA.30 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pmmn |
| Identification | |
| Color | Red-violet (fresh), darkens |
| Mohs scale hardness | 3½ |
| Luster | Metallic |
| Streak | Red |
| Diaphaneity | Opaque |
Rickardite is a copper telluride mineral (Cu7Te5) or Cu3-x (x = 0 to 0.36)Te2. It was first described for an occurrence in the Good Hope Mine, Vulcan district, Gunnison County, Colorado, US, and named for mining engineer Thomas Arthur Rickard (1864–1953) (Thomas Rickard is his cousin). It is a low temperature hydrothermal mineral that occurs associated with vulcanite, native tellurium, cameronite, petzite, sylvanite, berthierite, pyrite, arsenopyrite and bornite.
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