Arsenic triselenide
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Names | |
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Other names
Arsenic(III) selenide | |
Identifiers | |
1303-36-2 ![]() | |
3D model (Jmol) | Interactive image |
ChemSpider | 14089 ![]() |
ECHA InfoCard | 100.013.745 |
PubChem | 14772 |
RTECS number | CG2285000 |
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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 | |
Monoclinic, mP20, SpaceGroup = P21/c, No. 14
mP20 P21/c 14 | |
Hazards | |
EU classification (DSD) |
not listed |
NFPA 704 | |
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 otherwise noted, data are 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
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.[2]
Safety
Arsenic triselenide should be kept away from strong bases in contact with aluminium or zinc and strong acids.
References
- ↑ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–43, ISBN 0-8493-0594-2
- ↑ 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).
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