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Arsenic triselenide

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Arsenic triselenide
Names
Other names Arsenic(III) selenide
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.745 Edit this at Wikidata
EC Number
  • 215-119-5
PubChem CID
RTECS number
  • CG2285000
UNII
CompTox Dashboard (EPA)
InChI
  • InChI=1S/As2Se3/c3-1-5-2-4Key: WBFMCDAQUDITAS-UHFFFAOYSA-N
  • InChI=1/As2Se3/c3-1-5-2-4Key: WBFMCDAQUDITAS-UHFFFAOYAQ
SMILES
  • ==
Properties
Chemical formula As2Se3
Molar mass 386.756 g·mol
Appearance brown-black powder or metallic gray crystals
Odor odorless
Density 4.75 g/cm
Melting point 377 °C (711 °F; 650 K)
Solubility in water insoluble
Structure
Crystal structure Monoclinic, mP20
Space group P21/c, No. 14
Lattice constant a = 0.43 nm, b = 0.994 nm, c = 1.29058 nmα = 90°, β = 109.927°, γ = 90°
Formula units (Z) 4
Hazards
GHS labelling:
Pictograms GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Signal word Danger
Hazard statements H301, H330, H331, H373, H410
Precautionary statements 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)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
4 0 0
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 , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Arsenic triselenide is an inorganic chemical compound with the chemical formula As2Se3.

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.

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 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.

References

  1. ^ Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.49. ISBN 9781498754293.
  2. 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.
  3. 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.
  4. 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.
Arsenic compounds
Arsenides
As(III)
As(III,V)
As(V)
Salts and covalent derivatives of the selenide ion
H2Se
H2Se2
+H
-H 		He
Li2Se Be SexByOz CSe2
OCSe
(CH3)2Se 		(NH4)2Se O F Ne
Na2Se MgSe Al2Se3 Si PxSey
-P 		+S Cl Ar
K2Se CaSe Sc2Se3 TiSe2 V CrSe
Cr2Se3 		MnSe
MnSe2 		FeSe CoSe NiSe Cu2Se
CuSe 		ZnSe GaSe
Ga2Se3
-Ga 		GeSe
GeSe2
-Ge 		As2Se3
As4Se3 		Se
n 		Br Kr
Rb2Se SrSe Y2Se3 Zr NbSe2
NbSe3 		MoSe2 Tc Ru Rh Pd Ag2Se CdSe InSe
In2Se3 		SnSe
SnSe2
-Sn 		Sb2Se3 Te +I Xe
Cs2Se BaSe * LuSe
Lu2Se3 		Hf TaSe2 WSe2
WSe3 		ReSe2 Os Ir PtSe2 Au HgSe Tl2Se PbSe Bi2Se3 Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg CnSe Nh Fl Mc Lv Ts Og
 
* LaSe
La2Se3 		CeSe
Ce2Se3 		PrSe
Pr2Se3 		NdSe
Nd2Se3 		Pm SmSe
Sm2Se3 		EuSe
Eu2Se3 		GdSe
Gd2Se3 		TbSe
Tb2Se3 		DySe
Dy2Se3 		HoSe
Ho2Se3 		ErSe
Er2Se3 		TmSe
Tm2Se3 		YbSe
Yb2Se3
** Ac ThSe2 Pa USe2 Np PuSe Am Cm Bk Cf Es Fm Md No


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