| Tiemannite | |
|---|---|
| General | |
| Category | Selenide mineral |
| Chemical formula | HgSe |
| Strunz classification | 02.CB.05a |
| Dana classification | 02.08.02.04 |
| Identification | |
| Color | Steel-gray to black |
| Crystal habit | Massive and as euhedral crystals |
| Crystal system | Isometric - hextetrahedral (4 3m) |
| Cleavage | none |
| Mohs scale hardness | 2.5 |
| Luster | Metallic |
| Streak | grayish black |
| Diaphaneity | opaque |
| Specific gravity | 8.19 - 8.47 |
| References | [1][2] |
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 C. W. Tiemann (1848–1899).
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