Barium compounds: barium sulphide

barium symbol icon

The barium in barium sulphide formally is in the oxidation state 2.

Crystal structure of barium sulphide

Barium sulphide

  • Formula as often written: BaS
  • Hill system formula: Ba1S1
  • CAS registry number: [21109-95-5]
  • Formula weight: 169.393
  • Class: sulphide


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

Physical properties

  • Colour: white
  • Appearance: crystalline solid
  • Melting point: 2230°C; 1200°C
  • Boiling point:
  • Density: 4250 kg m-3


Coming soon...

Element analysis

Element percentages for the elements in barium sulphide
Element %
Ba 81.07
S 18.93


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

Isotope pattern

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

Formula: Ba1S1

mass  %
162   0.2 
163 0.0
164 0.1
165 0.0
166 3.4 __
167 9.2 _____
168 11.1 ______
169 16.1 ________
170 100.0 __________________________________________________
171 1.5 _
172 4.4 __
173 0.0
174 0.0


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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barium atomic number