Arsenic triselenide

Arsenic triselenide[1]
Names
Other names
Arsenic(III) selenide
Identifiers
1303-36-2 Yes
ChemSpider 14089 Yes
Jmol-3D images Image
PubChem 14772
RTECS number CG2285000
Properties
As2Se3
Molar mass 386.72 g/mol
Appearance brown-black powder
Odor odorless
Density 4.75 g/cm3
Melting point 360 °C (680 °F; 633 K)
insoluble
Structure
Crystal structure Monoclinic, mP20, SpaceGroup = P21/c, No. 14

mP20 P21/c 14

Hazards
EU classification not listed
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 4: Very short exposure could cause death or major residual injury. E.g., VX gas Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
0
4
0
Related compounds
Other anions
 diarsenic trioxide, diarsenic trisulfide, arsenic tribromide, arsenic(III) telluride
Other cations
 antimony(III) selenide
Related compounds
 arsenic(V) selenide
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Arsenic triselenide (As2Se3) is an inorganic chemical compound, a selenide of arsenic.

Amorphous arsenic triselenide is used as a chalcogenide glass for infrared optics, as it transmits light with wavelengths between 870 nm and 17.2 µm.

Arsenic triselenide is covalently bonded. Even so, the arsenic has a formal oxidation state of +3.

Solution processed thin film As2Se3[2]

Thin film selenide glasses have emerged as an important material for integrated photonics due to its high refractive index, mid-IR transparency and high non-linear optical indices. High-quality As2Se3 glass films can be deposited from spin coating method from ethylenediamine solutions.

Safety

Arsenic triselenide should be kept away from strong bases in contact with aluminium or zinc and strong acids.

References

  1. ↑ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–43, ISBN 0-8493-0594-2
  2. ↑ Yi Zou, Hongtao Lin, Okechukwu Ogbuu, Lan Li, Sylvain Danto, Spencer Novak, Jacklyn Novak, J. David Musgraves, Kathleen Richardson, and Juejun Hu, “Effect of annealing conditions on the physio-chemical properties of spin-coated As2Se3 chalcogenide glass films,” Optical Materials Express, Vol. 2, Issue 12, pp. 1723-1732 (2012).