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| Names | |
|---|---|
| Other names Arsenic(III) selenide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.013.745  |
| EC Number |
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PubChem CID | |
| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) | |
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SMILES
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| Properties | |
| As2Se3 | |
| Molar mass | 386.72 g/mol[1] |
| Appearance | brown-black powder[1] |
| Odor | odorless |
| Density | 4.75 g/cm3[1] |
| Melting point | 377 °C (711 °F; 650 K)[1] |
| insoluble[1] | |
| Structure[2] | |
| Monoclinic, mP20 | |
| P21/c, No. 14 | |
a = 0.43 nm, b = 0.994 nm, c = 1.29058 nm α = 90°, β = 109.927°, γ = 90° | |
Formula units (Z) | 4 |
| Hazards | |
| GHS pictograms | ) ) ) |
| GHS Signal word | Danger |
GHS hazard statements | H301, H330, H331, H373, H400, H410 |
GHS precautionary statements | P260, P261, P264, P270, P271, P273, P284, P301+310, P304+340, P310, P311, P314, P320, P321, P330, P391, P403+233, P405, P501 |
| NFPA 704 (fire diamond) | |
| 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). | |
Arsenic triselenide (As2Se3) is an inorganic chemical compound, a selenide of arsenic.
Amorphous arsenic triselenide is used as a chalcogenide glass for infrared optics. When purified, it transmits light with wavelengths between ca. 0.7 and 19 µm.[3]
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.[4]
References
- ^ a b c d e Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.49. ISBN 9781498754293.
- ^ Renninger, A. L.; Averbach, B. L. (1973). "Crystalline structures of As2Se3 and As4Se4". Acta Crystallographica Section B. 29 (8): 1583–1589. doi:10.1107/S0567740873005091.
- ^ Guillevic, Erwan; Zhang, Xianghua; Adam, Jean-Luc; Ma, Hongli; Lucas, Jacques; Tariel, Hugues (2011). "Fabrication of highly homogeneous As2Se3 glass under argon flow". Journal of Non-Crystalline Solids. 357 (15): 2897–2902. Bibcode:2011JNCS..357.2897G. doi:10.1016/j.jnoncrysol.2011.03.030.
- ^ Zou, Yi; Lin, Hongtao; Ogbuu, Okechukwu; Li, Lan; Danto, Sylvain; Novak, Spencer; Novak, Jacklyn; Musgraves, J. David; Richardson, Kathleen; Hu, Juejun (2012). "Effect of annealing conditions on the physio-chemical properties of spin-coated As2Se3 chalcogenide glass films". Optical Materials Express. 2 (12): 1723. Bibcode:2012OMExp...2.1723Z. doi:10.1364/OME.2.001723. S2CID 32070511.