Chromium compounds: chromium tribromide

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The chromium in chromium tribromide formally is in the oxidation state 3.

Crystal structure of chromium tribromide

Chromium tribromide

  • Formula as often written: CrBr3
  • Hill system formula: Br3Cr1
  • CAS registry number: [10031-25-1]
  • Formula weight: 291.708
  • Class: bromide

Synonyms

  • chromium tribromide
  • chromium(III) bromide
  • chromium bromide

Physical properties

  • Colour: olive green or dark green
  • Appearance: crystalline solid
  • Melting point: 812°C; 1130°C ?
  • Boiling point:
  • Density: 4680 kg m-3

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Element analysis

Element percentages for the elements in chromium tribromide
Element %
Br 82.18
Cr 17.82

Synthesis

Not available

Solid state structure

  • Geometry of chromium:
  • Prototypical structure:

Crystal structure of chromium tribromide

Isotope pattern

What follows is the calculated isotope pattern for the CrBr3 unit with the most intense ion set to 100%.

Formula: Cr1Br3

mass  %
287   1.7 _
288 0.0
289 37.2 ___________________
290 3.7 __
291 100.0 __________________________________________________
292 10.7 _____
293 96.0 ________________________________________________
294 10.4 _____
295 32.3 ________________
296 3.4 __
297 0.8

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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