-selenide-unit-cell-3D-balls.png) | |
| Names | |
|---|---|
| IUPAC name Mercury selenide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.039.903 |
| EC Number |
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| |
| |
| Properties | |
| HgSe | |
| Molar mass | 279.55 g/mol |
| Appearance | grey-black solid |
| Odor | odorless |
| Density | 8.266 g/cm3 |
| Melting point | 1,000 °C; 1,830 °F; 1,270 K |
| insoluble | |
| Structure | |
| sphalerite | |
| Thermochemistry | |
| 178 J kg−1 K−1 | |
Std enthalpy of formation(ΔfH⦵298) | 247 kJ/mol |
| Hazards | |
| GHS labelling:[1] | |
   | |
| Danger | |
| H300,H310,H330,H373,H410 | |
| P260,P262,P264,P270,P271,P273,P280,P284,P301+P310,P302+P350,P304+P340,P310,P314,P320,P321,P330,P361,P363,P391,P403+P233,P405,P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Related compounds | |
Otheranions | Mercury oxide Mercury sulfide Mercury telluride |
Othercations | Zinc selenide Cadmium selenide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Mercury selenide (HgSe; sometimesmercury(II) selenide) is a chemical compound ofmercury andselenium. It is a grey-blackcrystalline solidsemi-metal with a sphalerite structure. Thelattice constant is 0.608 nm.
HgSe occurs naturally as the mineralTiemannite, and is a component of the "intimate mixture" of HgSe and Se known as HgSe2.[2]
Along with other II-VI compounds,colloidal nanocrystals of HgSe can be formed.
Toxichydrogen selenide fumes can be evolved on exposure to acids. HgSe is non-toxic as long as it is not ingested due to its insolubility.
HgSe is forms large insoluble clusters with proteins during digestion, and a very precise co-administration of selenium during mercury ingestion has shown to reduce the resulting intoxication. The effect is too finicky for any practical use, but selenium's ability to complex mercury has been proposed to explain why relatively high mercury levels do not intoxicate deep-sea fish.[3]
