Aluminium selenide

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Aluminium selenide[1]
AlSestructure.png
Other names Aluminium(III) selenide
Identifiers
CAS number 1302-82-5
PubChem 164804
EC number 215-110-6
SMILES [Al+3].[Al+3].[Se-2].[Se-2].[Se-2]
Properties
Molecular formula Al2Se3
Molar mass 290.84 g/mol
Appearance yellow to brown powder
Odor odorless
Density 3.437 g/cm3
Melting point

947 °C, 1220 K, 1737 °F

Solubility in water decomposes
Structure
Crystal structure Monoclinic, mS20, Space group Cc, No. 9[2]
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-566.9 kJ/mol
Standard molar
entropy
So298
154.8 J/mol K
Hazards
EU classification not listed
NFPA 704

NFPA 704.svg

0
3
3
 
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Aluminium selenide, also known as aluminum selenide or aluminium(III) selenide, is a chemical compound. Its chemical formula is Al2Se3. It contains aluminium in its +3 oxidation state. It contains aluminium and selenide ions.

Properties[change | change source]

It reacts with water to make hydrogen selenide. It is a reducing agent and can burn to make aluminium oxide and selenium dioxide.

Preparation[change | change source]

It is made by reacting selenium with aluminium powder at a high temperature.

Uses[change | change source]

It is used to make hydrogen selenide.

Related pages[change | change source]

References[change | change source]

  1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–40. ISBN 0-8493-0594-2
  2. Steigmann, G. A.; Goodyear, J. (1966). "The crystal structure of Al2Se3". Acta Crystallographica 20: 617. doi:10.1107/S0365110X66001506.