Zinc selenide

Zinc selenide

Names
Other names Zinc selenide Stilleite
Identifiers
CAS Number	1315-09-9 Y
3D model ( JSmol )	zincblende structure: Interactive image wurtzite structure: Interactive image wurtzite structure: Interactive image
ChemSpider	7969585
ECHA InfoCard	100.013.873
EC Number	215-259-7
PubChem CID	4298215
UNII	OWX23150D5 Y
CompTox Dashboard (EPA)	DTXSID80893851
InChI InChI=1S/Se.Zn Key: SBIBMFFZSBJNJF-UHFFFAOYSA-N
SMILES zincblende structure: [SeH+2]12[ZnH2-2][SeH+2]3[ZnH2-2][SeH+2]([ZnH-2]14)[ZnH-2]1[Se+2]5([ZnH-2]38)[Zn-2]26[SeH+2]2[ZnH-2]([Se+2]4)[SeH+2]1[ZnH2-2][SeH+2]3[ZnH-2]2[Se+2][ZnH-2]([SeH+2]6[ZnH-2]([SeH+2])[SeH+2]68)[SeH+2]([ZnH2-2]6)[ZnH-2]35 wurtzite structure: [ZnH2-2]1[Se+2]47[ZnH-2]2[Se+2][ZnH-2]3[Se+2]8([ZnH2-2][SeH+2]([ZnH2-2]4)[ZnH2-2]6)[ZnH-2]4[Se+2][ZnH-2]5[Se+2]6([ZnH2-2]6)[Zn-2]78[Se+2]78[ZnH-2]([SeH+2]69)[SeH+2]5[ZnH2-2][SeH+2]4[ZnH-2]7[SeH+2]3[ZnH2-2][SeH+2]2[ZnH-2]8[SeH+2]1[ZnH2-2]9 wurtzite structure: [ZnH2-2]1[SeH+2]([ZnH2-2]6)[ZnH2-2][SeH+2]7[ZnH-2]2[Se+2][Zn-2]3([Se+2][ZnH-2]9[Se+2]5)[Se+2]18[Zn-2]45[Se+2][ZnH-2]5[SeH+2]6[Zn-2]78[Se+2]78[ZnH2-2][SeH+2]5[ZnH2-2][Se+2]4([ZnH2-2][SeH+2]9[ZnH2-2]4)[ZnH-2]7[Se+2]34[ZnH2-2][SeH+2]2[ZnH2-2]8
Properties
Chemical formula	ZnSe
Molar mass	144.35 g/mol
Appearance	light yellow solid
Density	5.27 g/cm3
Melting point	1,525 °C (2,777 °F)
Solubility in water	negligible
Band gap	2.82 eV (10 K)
Refractive index (nD)	2.67 (550 nm) 2.40 (10.6 μm)
Structure
Crystal structure	Zincblende (cubic)
Lattice constant	a = 566.8 pm
Coordination geometry	Tetrahedral (Zn2+) Tetrahedral (Se2−)
Thermochemistry
Std enthalpy of formation (ΔfH⦵298)	−177.6 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Precautionary statements	P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501
Related compounds
Other anions	Zinc oxide Zinc sulfide Zinc telluride
Other cations	Cadmium selenide Mercury 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

Zinc selenide is the

Cubic ZnSe is produced by treatment of an aqueous solution of zinc sulfate with hydrogen selenide:^[1]

ZnSO₄ + H₂Se → ZnSe + H₂SO₄

Heating the cubic form gives hexagonal ZnSe.

An alternative synthesis involves heating a mixture of zinc oxide, zinc sulfide, and selenium:

2 ZnO + ZnS + 3 Se → 3 ZnSe + SO₂

It is a wide-bandgap semiconductor of the

• ZnSe is used to form II-VI
  diode lasers. It emits blue light^{[dubious – discuss}
  ].
• ZnSe doped with
  μm.^[2]
• It is used as an infrared optical material with a remarkably wide transmission wavelength range (0.45 μm to 21.5 μm
  antireflection or beamsplitting optical coatings
  are generally employed.
• ZnSe activated with tellurium (ZnSe(Te)) is a scintillator with emission peak at 640 nm, suitable for matching with photodiodes. It is used in x-ray and gamma ray detectors. ZnSe scintillators are significantly different from the ZnS ones.

Reactions

ZnSe is insoluble in water, but dissolves in concentrated hydrochloric acid.

It can be deposited as a thin film by

References