Gallium(III) selenide

Gallium(III) selenide
Names
Other names
gallium triselenide
Identifiers
ChemSpider
ECHA InfoCard 100.031.527 Edit this at Wikidata
EC Number
  • 234-693-8
Properties
Ga2Se3
Molar mass 376.33 g/mol
Appearance reddish-black crystals
Odor slight garlic odor
Density 4.92 g/cm3
Melting point 1,020 °C (1,870 °F; 1,290 K)
decomposition
Hazards
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H330, H373, H410
P260, P264, P270, P271, P273, P284, P301+P310, P304+P340, P310, P314, P320, P321, P330, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
0
1
Related compounds
Other anions
 Gallium(III) oxide, Gallium(III) sulfide, Gallium tribromide, Gallium(III) telluride
Other cations
 Aluminium(III) selenide, Indium(III) selenide
Related compounds
 Gallium monoselenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Gallium(III) selenide (Ga2Se3) is a chemical compound. It has a defect sphalerite (cubic form of ZnS) structure.[1] It is a p-type semiconductor [2]

It can be formed by union of the elements. It hydrolyses slowly in water and quickly in mineral acids to form toxic hydrogen selenide gas. The reducing capabilities of the selenide ion make it vulnerable to oxidizing agents. It is advised therefore that it not come into contact with bases.[citation needed]

  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. ^ Temperature dependence of electrical conductivity and Hall effect of Ga2Se3 single crystal, A. E. Belal, Dr. H. A. El-shaikh, I. A. Ashraf, Crystal Research and Technology, 30, 1, 135 - 139