WebElements Periodic Table of the Elements | Arsenic

Arsenic compounds: diarsenic pentaselenide

The arsenic in diarsenic pentaselenide formally is in the oxidation state 5.

Diarsenic pentaselenide

Formula as often written: As₂Se₅
Hill system formula: As₂Se₅
CAS registry number: [1303-37-3]
Formula weight: 544.643
Class: selenide

Synonyms

diarsenic pentaselenide
arsenic(V) selenide
arsenic selenide

Physical properties

Colour: black
Appearance: solid
Melting point:
Boiling point:
Density:

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Element analysis

Element percentages for the elements in diarsenic pentaselenide
Element	%
As	27.51
Se	72.49

Synthesis

Not available

Isotope pattern

What follows is the calculated isotope pattern for the As₂Se₅ unit with the most intense ion set to 100%.

Formula: As₂Se₅

mass  %
530   0.0 
531   0.0 
532   0.2 
533   0.0 
534   1.0 
535   0.2 
536   3.6 __
537   0.6 
538  10.5 _____
539   1.5 _
540  25.2 _____________
541   2.8 _
542  49.5 _________________________
543   4.2 __
544  78.9 _______________________________________
545   4.7 __
546 100.0 __________________________________________________
547   3.5 __
548  97.0 ________________________________________________
549   1.5 _
550  68.2 __________________________________
551   0.4 
552  31.0 ________________
553   0.0 
554   8.6 ____
555   0.0 
556   1.4 _
557   0.0 
558   0.1

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.