Tiemannite
Tiemannite is a mineral, mercury selenide, formula HgSe. It occurs in hydrothermal veins associated with other selenides, or other mercury minerals such as cinnabar, and often with calcite. Discovered in 1855 in Germany, it is named after Johann Carl Wilhelm Tiemann (1848–1899).
| Tiemannite | |
|---|---|
 | |
| General | |
| Category | Selenide mineral |
| Formula (repeating unit) | HgSe |
| Strunz classification | 2.CB.05a |
| Dana classification | 02.08.02.04 |
| Crystal system | Isometric |
| Crystal class | Hextetrahedral (43m) H-M symbol: (4 3m) |
| Space group | F43m |
| Identification | |
| Color | Steel-gray to black |
| Crystal habit | Massive and as euhedral crystals |
| Cleavage | none |
| Mohs scale hardness | 2.5 |
| Luster | Metallic |
| Streak | grayish black |
| Diaphaneity | opaque |
| Specific gravity | 8.19 - 8.47 |
| References | [1][2] |
References
- Tiemannite from a micro-disseminated gold deposit in Qiongmo, Liu Jiajun, Zheng Minghua, Liu Jianming, Lu Wenquan, Journal of Chengdu Institute of Technology, vol. 23 (2), pages 21–28 (1996)
- Timanite and onofrite in ores of Siberian mercury deposits, Vasil'yev V.I., Lavrent'yev Y.G., Doklady (Academy of Sciences of the USSR, Earth Sciences Section) vol. 222, Pages 159-162 (1975).
External links
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