Barium: barium dibromide dihydrate

barium dibromide dihydrate is known by the following synonyms:

  • barium dibromide dihydrate
  • barium(II) bromide 2-water
  • barium bromide 2-water

The oxidation number of barium in barium dibromide dihydrate is 2.

  • Formula: BaBr2.2H2O
  • Hill system formula: Ba1Br2H4O2
  • CAS registry number: [7791-28-8]
  • Formula weight: 333.166
  • Class: bromide
  • Colour: white
  • Appearance: crystalline solid
  • Melting point: 75°C (decomposes, loses H2O)
  • Boiling point: 120
  • Density: 3700 kg m-3

Synthesis

Barium bromide is made by the neutralization of barium carbonate with HBr in water. The product crystallizes as the hydrate BaBr2.2H2O. If this heated, dehydration to anhydrous BaBr2 occurs.

BaCO3 + 2HBr(aq) → BaBr2(aq)

Element analysis

Element percentages in barium dibromide dihydrate
Element %
Ba 41.22
Br 47.97
H 1.21
O 9.60

Isotope pattern for BaBr2.2H2O

THe chart below shows the calculated isotope pattern for the formula BaBr2.2H2O with the most intense ion set to 100%.

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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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