Arsenic triselenide

Names
Other names

Arsenic(III) selenide

Identifiers

CAS Number

* 1303-36-2 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 14089 Y

EC Number |

* 215-119-5

PubChem CID

* 14772

RTECS number |

* CG2285000

UNII |

* XWS0W0GB8G

InChI

* InChI=1S/As2Se3/c3-1-5-2-4 Y

Key: WBFMCDAQUDITAS-UHFFFAOYSA-N Y

* InChI=1/As2Se3/c3-1-5-2-4

Key: WBFMCDAQUDITAS-UHFFFAOYAQ

SMILES

* [Se]=[As][Se][As]=[Se]

Properties

Chemical formula

| 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]

Solubility in water

| insoluble[1]
Structure[2]

Crystal structure

| Monoclinic, mP20

Space group

| P21/c, No. 14

Lattice constant

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, 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(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).

Y verify (what is YN ?)
Infobox references

Arsenic triselenide is an inorganic chemical compound with the chemical formula As
2Se

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

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. ↑ 1.0 1.1 1.2 Cite error: Invalid `<ref>` tag; no text was provided for refs named `crc`
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. doi:10.1016/j.jnoncrysol.2011.03.030. Bibcode: 2011JNCS..357.2897G.
4. ↑ 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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Arsenic compounds

* AsBr3
* AsCl3
* AsCl5
* AsF3
* AsF5
* AsH3
* AsHgI4
* AsI3
* As2O3
* As2O5
* As2S3
* As2S5
* As2Se3
* As4S4

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Selenides

| H2Se
H2Se2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | He

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Li2Se | Be |  |  |  |  |  |  |  |  |  |  | B | CSe2
OCSe | (NH4)2Se | O | F | Ne
Na2Se | MgSe |  |  |  |  |  |  |  |  |  |  | Al2Se3 | Si | PxSey | S | Cl | Ar
K2Se | CaSe | Sc2Se3 | TiSe2 | V | CrSe
Cr2Se3 | MnSe
MnSe2 | FeSe | CoSe | NiSe | CuSe | ZnSe | GaSe
Ga2Se3 | GeSe | As2Se3
As4Se3 | Se | Br | Kr
Rb2Se | SrSe | Y2Se3 | Zr | NbSe2
NbSe3 | MoSe2 | Tc | Ru | Rh | Pd | Ag2Se | CdSe | In2Se3 | SnSe
SnSe2 | Sb2Se3 | Te | I | Xe
Cs2Se | BaSe | *  | Hf | Ta | WSe2
WSe3 | ReSe2 | Os | Ir | Pt | Au | HgSe | Tl2Se | PbSe | Bi2Se3 | Po | At | Rn
Fr | Ra | **  | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | CnSe | Nh | Fl | Mc | Lv | Ts | Og |  |  |  |  |  |  |  |
|  | ↓ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| * | La2Se3 | Ce2Se3 | Pr2Se3 | Nd2Se3 | Pm | Sm2Se3 | Eu2Se3 | Gd | Tb | Dy | Ho | Er2Se3 | Tm2Se3 | Yb | Lu |
| ** | Ac | ThSe2 | Pa | USe2 | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |

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*[CID]: Compound ID
*[H301]: Toxic if swallowed
*[H330]: Fatal if inhaled
*[H331]: Toxic if inhaled
*[H373]: May cause damage to organs through prolonged or repeated exposure
*[H410]: Very toxic to aquatic life with long lasting effects
*[P260]: Do not breathe dust/fume/gas/mist/vapours/spray
*[P261]: Avoid breathing dust/fume/gas/mist/vapours/spray
*[P264]: Wash … thoroughly after handling
*[P270]: Do not eat, drink or smoke when using this product
*[P271]: Use only outdoors or in a well-ventilated area
*[P273]: Avoid release to the environment
*[P284]: Wear respiratory protection
*[P301+310]: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
*[P304+340]: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
*[P310]: Immediately call a POISON CENTER or doctor/physician
*[P311]: Call a POISON CENTER or doctor/physician
*[P314]: Get Medical advice/attention if you feel unwell
*[P320]: Specific treatment is urgent (see … on this label)
*[P321]: Specific treatment (see … on this label)
*[P330]: Rinse mouth
*[P391]: Collect spillage
*[P403+233]: Store in a well ventilated place. Keep container tightly closed
*[P405]: Store locked up
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