WebElements Periodic Table of the Elements | Aluminium

Aluminium compounds: dialuminium triselenide

The aluminium in dialuminium triselenide formally is in the oxidation state 3.

Dialuminium triselenide

Formula as often written: Al₂Se₃
Hill system formula: Al₂Se₃
CAS registry number: [1302-82-5]
Formula weight: 290.843
Class: selenide

Synonyms

dialuminium triselenide
aluminium(III) selenide
aluminium selenide
aluminum selenide
aluminum(III) selenide
dialuminum triselenide

Physical properties

Colour: yellow-brown
Appearance: powder
Melting point: 960°C
Boiling point:
Density: 3437 kg m^-3

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Element analysis

Element percentages for the elements in dialuminium triselenide
Element	%
Al	18.55
Se	81.45

Synthesis

Not available

Solid state structure

Geometry of aluminium: 4 coordinate: tetrahedral
Prototypical structure:

Crystal structure of dialuminium triselenide

Isotope pattern

What follows is the calculated isotope pattern for the Al₂Se₃ unit with the most intense ion set to 100%.

Formula: Al₂Se₃

mass  %
278   0.0 
279   0.0 
280   0.1 
281   0.0 
282   0.9 
283   0.1 
284   4.5 __
285   0.6 
286  15.8 ________
287   1.6 _
288  40.3 ____________________
289   2.7 _
290  76.2 ______________________________________
291   3.1 __
292 100.0 __________________________________________________
293   1.0 
294  88.2 ____________________________________________
295   0.1 
296  34.5 _________________
297   0.0 
298   5.9 ___
299   0.0 
300   0.4

References

The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.