Barium sulphide

  • Formula: BaS
  • Hill system formula: Ba1S1
  • CAS registry number: [21109-95-5]
  • Formula weight: 169.393
  • Class: sulphide
  • Colour: white
  • Appearance: crystalline solid
  • Melting point: 2230°C; 1200°C
  • Boiling point:
  • Density: 4250 kg m-3

The following are some synonyms of barium sulphide:

  • barium sulphide
  • barium(II) sulphide
  • barium sulfide
  • barium(II) sulfide

The oxidation number of barium in barium sulphide is 2.


Barium sulfide can be made by the reduction of barium sulfate with hydrogen gas at high temperatures.

BaSO4 + 4H2 (950°C) → BaS(s) + 4H2O(g)

Solid state structure

  • Geometry of barium: 6 coordinate: octahedral
  • Prototypical structure: NaCl (rock salt)

Crystal structure of barium sulphide

Element analysis

The table shows element percentages for BaS (barium sulphide).

Element %
Ba 81.07
S 18.93

Isotope pattern for BaS

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