Osmium compounds: osmium octafluoride

osmium symbol icon

The osmium in osmium octafluoride formally is in the oxidation state 8.

Osmium octafluoride

  • Formula as often written: OsF8
  • Hill system formula: F8Os1
  • CAS registry number: [18432-81-0]
  • Formula weight: 342.217
  • Class: fluoride


  • osmium octafluoride
  • osmium(VIII) fluoride
  • osmium fluoride

Physical properties

  • Colour:
  • Appearance:
  • Melting point:
  • Boiling point:
  • Density:


Coming soon...

Element analysis

Element percentages for the elements in osmium octafluoride
Element %
F 44.41
Os 55.59


This may be erroneously assigned as OsF8 when it should be OsF6. See http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=4290427

Isotope pattern

What follows is the calculated isotope pattern for the OsF8 unit with the most intense ion set to 100%.

Formula: Os1F8

mass  %
336   0.0 
337 0.0
338 3.9 __
339 3.9 __
340 32.4 ________________
341 39.3 ____________________
342 64.4 ________________________________
343 0.0
344 100.0 __________________________________________________


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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