Chemistry:Arsenic triselenide
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| Names | |
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| Other names
Arsenic(III) selenide
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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| Properties | |
| As2Se3 | |
| Molar mass | 386.756 g·mol−1 |
| Appearance | brown-black powder[1] or metallic gray crystals |
| Odor | odorless |
| 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°
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Formula units (Z)
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4 |
| Hazards | |
| GHS pictograms |   
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| GHS Signal word | Danger |
| H301, H330, H331, H373, H410 | |
| 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
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Other cations
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antimony(III) selenide |
Related compounds
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arsenic(V) selenide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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| Infobox references | |
Arsenic triselenide is an inorganic chemical compound with the chemical formula As
2Se
3.
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]
In arsenic triselenide, arsenic is covalently bonded to selenium, where arsenic has a formal oxidation state of +3, and selenium −2.
Solution processed thin film As
2Se
3
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 As
2Se
3 glass films can be deposited from spin coating method from ethylenediamine solutions.[4]
References
- ↑ 1.0 1.1 1.2 Cite error: Invalid
<ref>tag; no text was provided for refs namedcrc - ↑ 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. doi:10.1016/j.jnoncrysol.2011.03.030. Bibcode: 2011JNCS..357.2897G.
- ↑ Zou, Yi; Lin, Hongtao; Ogbuu, Okechukwu; Li, Lan; Danto, Sylvain; Novak, Spencer; Novak, Jacklyn; Musgraves, J. David et al. (2012). "Effect of annealing conditions on the physio-chemical properties of spin-coated As2Se3 chalcogenide glass films". Optical Materials Express 2 (12): 1723. doi:10.1364/OME.2.001723. Bibcode: 2012OMExp...2.1723Z.
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