Misplaced Pages

This is an old revision of this page, as edited by 564dude (talk | contribs) at 23:04, 14 November 2011 (Replaced manually entered references with {{cite doi}} template, removed {{citation style}} category). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Mercury(II) selenide

Names
IUPAC name Mercury selenide
Identifiers
CAS Number	20601-83-6
ECHA InfoCard	100.039.903
CompTox Dashboard (EPA)	DTXSID8066630
Properties
Chemical formula	HgSe
Molar mass	279.55 g/mol
Appearance	grey-black solid
Density	8.3 g/cm
Melting point	1270 K
Solubility in water	insoluble
Structure
Crystal structure	sphalerite
Thermochemistry
Heat capacity (C)	178 J kg K
Std enthalpy of formation (ΔfH298)	247 kJ/mol
Hazards
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 , 100 kPa). Y verify (what is  ?) Infobox references

Mercury selenide (HgSe) 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.

Mercury selenide can also refer to the following chemical compounds: HgSe₂ and HgSe₈. HgSe is strictly mercury(II) selenide.

HgSe occurs naturally as the mineral Tiemannite.

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

Applications

• Selenium is used in filters in some steel plants to remove mercury from exhaust gases. The solid product formed is HgSe.
• HgSe can be used as an ohmic contact to wide-gap II-VI semiconductors such as zinc selenide or zinc oxide.

Toxicity

HgSe is non-toxic so long as it is not ingested due to its insolubility. Toxic hydrogen selenide fumes can be evolved on exposure to acids. HgSe is a relatively stable compound which might mean that it is less toxic than elemental mercury or many organometallic mercury compounds. Selenium's ability to complex with mercury has been proposed as a reason for the lack of mercury toxicity in deep sea fish despite high mercury levels.

See also

• Mercury sulfide
• Mercury telluride
• Cadmium selenide
• Zinc selenide

References

1. Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1620/tjem.196.71, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1620/tjem.196.71 instead.

• Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1103/PhysRevLett.22.884, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1103/PhysRevLett.22.884 instead.
• Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1103/PhysRev.130.2277, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1103/PhysRev.130.2277 instead.
• Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1103/PhysRevLett.78.3165, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1103/PhysRevLett.78.3165 instead..
• Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1016/0022-0248(90)91059-Y, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with |doi=10.1016/0022-0248(90)91059-Y instead.
• SNV (1991) Guidelines on measures and methods for heavy metal emissions control. Solna, The Swedish Environmental Protection Agency – Naturvårdsverket.

External links

• http://ctdp.ensmp.fr/species/Tiemannite.html
• List of related Hg chalcogenides

• Mercury compounds
• Selenides