Barium dibromide

  • Formula: BaBr2
  • Hill system formula: Ba1Br2
  • CAS registry number: [10553-31-8]
  • Formula weight: 297.135
  • Class: bromide
  • Colour: white
  • Appearance: crystalline solid
  • Melting point: 857°C
  • Boiling point: 1835°C
  • Density: 4781 kg m-3

The following are some synonyms of barium dibromide:

  • barium dibromide
  • barium(II) bromide
  • barium bromide

The oxidation number of barium in barium dibromide is 2.


Barium bromide is made by the neutralization of barium carbonate with HBr in water. The product crystallizes as the hydrate BaBr2.2H2O [7791-28-8] which must be heated to make anhydrous BaBr2.

BaCO3 + 2HBr(aq) → BaBr2(aq)

Solid state structure

  • Geometry of barium:
  • Prototypical structure:

Crystal structure of barium dibromide

Element analysis

The table shows element percentages for BaBr2 (barium dibromide).

Element %
Ba 46.22
Br 53.78

Isotope pattern for BaBr2

The chart below shows the calculated isotope pattern for the formula BaBr2 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.

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