Chemistry:Weissite
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| Weissite | |
|---|---|
| General | |
| Category | Telluride mineral |
| Formula (repeating unit) | Cu2−xTe |
| Strunz classification | 2.BA.30 |
| Crystal system | Hexagonal |
| Crystal class | Dihexagonal dipyramidal (6mmm) H-M symbol: (6/m 2/m 2/m) |
| Space group | P6/mmm |
| Unit cell | a = 12.54, c = 21.71 [Å]; Z = 15 |
| Identification | |
| Color | Bluish black to black with tarnish |
| Crystal habit | Lens shaped masses |
| Cleavage | None |
| Fracture | Uneven |
| Mohs scale hardness | 3 |
| |re|er}} | Metallic |
| Streak | Black |
| Diaphaneity | Opaque |
| Specific gravity | 6 |
| Birefringence | Distinct |
| Pleochroism | Distinct |
| References | [1][2][3] |
Weissite is a telluride mineral, a copper telluride. Its chemical formula is Cu2−xTe. Weissite has hexagonal crystal structure. Its specific gravity is 6 and its Mohs hardness is 3. Occurrence is in Gunnison County, Colorado, Arizona and New Mexico in the United States . It is also reported from Kalgoorlie, Western Australia and Dalarna and Värmland, Sweden.[2]
Weissite occurs in hydrothermal deposits associated with pyrite, native tellurium, sylvanite, petzite, rickardite, native sulfur, native gold, calaverite and krennerite.[1]
It was first described in 1927 for an occurrence in the Good Hope Mine in the Vulcan District of Gunnison County, Colorado.[2] It was named for mine owner Louis Weiss.[3]
See also
References
- ↑ 1.0 1.1 Weissite in the Handbook of Mineralogy
- ↑ 2.0 2.1 2.2 Mindat entry
- ↑ 3.0 3.1 Webmineral
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
- D. M. Chizhikov and V. P. Shchastlivyi, 1966, Tellurium and Tellurides, Nauka Publishing, Moscow
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