WebElements Periodic Table of the Elements | Selenium

Selenium compounds: tetraselenium tetrasulphide

The selenium in tetraselenium tetrasulphide formally is in the oxidation state 2.

Tetraselenium tetrasulphide

Formula as often written: Se₄S₄
Hill system formula: S₄Se₄
CAS registry number: [75926-28-2]
Formula weight: 444.104
Class: sulphide

Synonyms

tetraselenium tetrasulphide
selenium(II) sulphide
selenium(II) sulfide
tetraselenium tetrasulfide

Physical properties

Colour: red
Appearance: crystalline solid
Melting point: 113°C (decomposes)
Boiling point:
Density: 3300 kg m^-3

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Element analysis

Element percentages for the elements in tetraselenium tetrasulphide
Element	%
S	28.88
Se	71.12

Synthesis

Not available

Isotope pattern

What follows is the calculated isotope pattern for the Se₄S₄ unit with the most intense ion set to 100%.

Formula: Se₄S₄

mass  %
430   0.0 
431   0.0 
432   0.2 
433   0.0 
434   0.9 
435   0.2 
436   3.7 __
437   0.6 
438  11.6 ______
439   1.8 _
440  29.1 _______________
441   3.6 __
442  57.2 _____________________________
443   5.4 ___
444  87.5 ____________________________________________
445   6.1 ___
446 100.0 __________________________________________________
447   4.7 __
448  81.6 _________________________________________
449   2.9 _
450  41.0 ____________________
451   1.2 _
452  12.4 ______
453   0.3 
454   2.3 _
455   0.1 
456   0.3 
457   0.0 
458   0.0

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.