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Aluminium selenide

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Aluminium selenide
Aluminum selenide
Aluminum selenide
Names
Other names Aluminium(III) selenide
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.737 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/2Al.3Se/q2*+3;3*-2Key: CYRGZAAAWQRSMF-UHFFFAOYSA-N
  • InChI=1/2Al.3Se/q2*+3;3*-2Key: CYRGZAAAWQRSMF-UHFFFAOYAJ
SMILES
  • ....
Properties
Chemical formula Al2Se3
Molar mass 290.84 g/mol
Appearance yellow to brown powder
Density 3.437 g/cm
Melting point 960 °C
Solubility in water decomposes
Structure
Crystal structure Monoclinic, mS20, Space group Cc, No. 9
Hazards
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 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazards (white): no code
3 0 3
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

Aluminium selenide is the inorganic compound with the formula Al2Se3.

It is a solid prepared by igniting a mixture of the elements:

2 Al + 3 Se → Al2Se3

The pure compound is white, but typical samples are coloured. Samples of aluminium selenide must be protected from moisture, because the compound hydrolyzes readily, giving off highly toxic hydrogen selenide gas:

Al2Se3 + 3 H2O → Al2O3 + 3 H2Se

Al2Se3 has been used as a precursor to hydrogen selenide, which is released when the solid is treated with acids.

Safety

Aluminium selenide should be stored and handled away from moisture and air.

References

  1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–40. ISBN 0-8493-0594-2Template:Inconsistent citations{{cite book}}: CS1 maint: postscript (link)
  2. Steigmann, G. A.; Goodyear, J. (1966). "The crystal structure of Al2Se3". Acta Crystallographica. 20: 617. doi:10.1107/S0365110X66001506.
  3. ^ G. R. Waitkins, R. Shutt "Aluminum Selenide and Hydrogen Selenide" Inorganic Syntheses, 1946, vol. 2, pp. 183–186. doi:10.1002/9780470132333.ch55
  4. Bernd E. Langner "Selenium and Selenium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a23_525.
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Aluminium compounds
Al(I)
Organoaluminium(I) compoundsAl(C5(CH3)5)
Al(II)
Al(III)
Alums
Organoaluminium(III) compounds
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