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Names | |
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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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Properties | |
As2Se3 | |
Molar mass | 386.756 g·mol−1 |
Appearance | brown-black powder [1] or metallic gray crystals |
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 labelling: | |
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Danger | |
H301, H330, H331, H373, H410 | |
P260, P261, P264, P270, P271, P273, P284, P301+P310, P304+P340, P310, P311, P314, P320, P321, P330, P391, P403+P233, P405, P501 | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions | |
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 is an inorganic chemical compound with the chemical formula As 2 Se 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.
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]