Uranium trifluoride

  • Formula: UF3
  • Hill system formula: F3U1
  • CAS registry number: [13775-06-9]
  • Formula weight: 295.024
  • Class: fluoride
  • Colour: black or purple-black
  • Appearance: crystalline solid
  • Melting point: 1140°C (decomposes)
  • Boiling point:
  • Density: 8900 kg m-3

The following are some synonyms of uranium trifluoride:

  • uranium trifluoride
  • uranium(III) fluoride
  • uranium fluoride

The oxidation number of uranium in uranium trifluoride is 3.


Not available

Solid state structure

  • Geometry of uranium: 9 coordinate: tricapped trigonal prismatic
  • Prototypical structure:

Crystal structure of uranium trifluoride

Element analysis

The table shows element percentages for UF3 (uranium trifluoride).

Element %
F 19.32
U 80.68

Isotope pattern for UF3

The chart below shows the calculated isotope pattern for the formula UF3 with the most intense ion set to 100%.


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.

Explore periodic propertes from these links