Uranium compounds: uranium tetrabromide

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The uranium in uranium tetrabromide formally is in the oxidation state 4.

Crystal structure of uranium tetrabromide

Uranium tetrabromide

  • Formula as often written: UBr4
  • Hill system formula: Br4U1
  • CAS registry number: [13470-20-7]
  • Formula weight: 557.645
  • Class: bromide

Synonyms

  • uranium tetrabromide
  • uranium(IV) bromide
  • uranium bromide

Physical properties

  • Colour: brown
  • Appearance: crystalline solid
  • Melting point: 519°C
  • Boiling point: 791°C
  • Density: 5190 kg m-3

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Element analysis

Element percentages for the elements in uranium tetrabromide
Element %
Br 57.32
U 42.68

Synthesis

Not available

Solid state structure

  • Geometry of uranium: 7 coordinate: pentagonal bipyramidal
  • Prototypical structure:

Crystal structure of uranium tetrabromide

Isotope pattern

What follows is the calculated isotope pattern for the UBr4 unit with the most intense ion set to 100%.

Formula: U1Br4

mass  %
550   0.0 
551 0.1
552 0.0
553 0.5
554 17.6 _________
555 0.7
556 68.5 __________________________________
557 0.5
558 100.0 __________________________________________________
559 0.1
560 64.8 ________________________________
561 0.0
562 15.8 ________

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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