Tungsten compounds: tungsten diselenide

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The tungsten in tungsten diselenide formally is in the oxidation state 4.

Crystal structure of tungsten diselenide

Tungsten diselenide

  • Formula as often written: WSe2
  • Hill system formula: Se2W1
  • CAS registry number: [12067-46-8]
  • Formula weight: 341.76
  • Class: selenide

Synonyms

  • tungsten diselenide
  • tungsten(IV) selenide
  • tungsten selenide

Physical properties

  • Colour: grey
  • Appearance: crystalline solid
  • Melting point:
  • Boiling point:
  • Density: 9200 kg m-3

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Element analysis

Element percentages for the elements in tungsten diselenide
Element %
Se 46.21
W 53.79

Synthesis

Not available

Solid state structure

  • Geometry of tungsten:
  • Prototypical structure:

Crystal structure of tungsten diselenide

Isotope pattern

What follows is the calculated isotope pattern for the WSe2 unit with the most intense ion set to 100%.

Formula: W1Se2

mass  %
330   0.0 
331 0.0
332 0.2
333 0.1
334 2.0 _
335 1.1 _
336 9.3 _____
337 4.5 __
338 30.0 _______________
339 12.5 ______
340 65.0 ________________________________
341 20.2 __________
342 100.0 __________________________________________________
343 22.5 ___________
344 94.5 _______________________________________________
345 6.9 ___
346 57.9 _____________________________
347 0.6
348 14.7 _______
349 0.0
350 1.2 _

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.

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tungsten atomic number