Mercury selenide

Mercury(II) selenide
Names
	IUPAC name Mercury selenide
Identifiers
CAS Number	20601-83-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	8014295;
ECHA InfoCard	100.039.903
EC Number	243-910-5;
PubChem CID	88609;
CompTox Dashboard (EPA)	DTXSID8066630 ;
	InChI InChI=1S/Hg.Se Key: YQMLDSWXEQOSPP-UHFFFAOYSA-N; InChI=1S/Hg.Se;
	SMILES [Se]=[Hg];
Properties
Chemical formula	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
Solubility in water	insoluble
Structure
Crystal structure	sphalerite
Thermochemistry
Heat capacity (C)	178 J kg−1 K−1
Std enthalpy of; formation (ΔfH⦵298)	247 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H310, H330, H373, H410
Precautionary statements	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 Preview warning: Omit Rules: keep P320, omit P322
NFPA 704 (fire diamond)	4 0 1
Flash point	Non-flammable
Related compounds
Other anions	Mercury oxide; Mercury sulfide; Mercury telluride
Other cations	Zinc selenide; Cadmium selenide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Mercury selenide (HgSe; sometimes mercury(II) selenide) is a chemical compound of mercury and selenium. It is a grey-black crystalline solid semi-metal with a sphalerite structure. The lattice constant is 0.608 nm.

HgSe occurs naturally as the mineral Tiemannite, and is a component of the "intimate mixture" of HgSe and Se known as HgSe₂.

Along with other II-VI compounds, colloidal nanocrystals of HgSe can be formed.