Barium dihydride

  • Formula: BaH2
  • Hill system formula: Ba1H2
  • CAS registry number: [13477-09-3]
  • Formula weight: 139.343
  • Class: hydride
  • Colour: grey
  • Appearance: crystalline solid
  • Melting point: 1200°C; 675°C (decomposes to metal with loss of H2)
  • Boiling point:
  • Density: 4160 kg m-3

The following are some synonyms of barium dihydride:

  • barium dihydride
  • barium(II) hydride
  • barium hydride

The oxidation number of barium in barium dihydride is 2.


Barium hydride is made by the reaction of barium metal and hydrogen gas at high temperature and pressure.

Ba(s) + H2(g) → BaH2(s)

Solid state structure

  • Geometry of barium:
  • Prototypical structure:

Crystal structure of barium dihydride

Element analysis

The table shows element percentages for BaH2 (barium dihydride).

Element %
Ba 98.55
H 1.45

Isotope pattern for BaH2

The chart below shows the calculated isotope pattern for the formula BaH2 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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