Rubidium compounds: dirubidium sulphide

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The rubidium in dirubidium sulphide formally is in the oxidation state 1.

Crystal structure of dirubidium sulphide

Dirubidium sulphide

  • Formula as often written: Rb2S
  • Hill system formula: Rb2S1
  • CAS registry number: [31083-74-6]
  • Formula weight: 203.002
  • Class: sulphide

Synonyms

  • dirubidium sulphide
  • rubidium(I) sulphide
  • dirubidium sulfide
  • rubidium sulfide
  • rubidium sulphide
  • rubidium(I) sulfide

Physical properties

  • Colour: white, yellow or red
  • Appearance:
  • Melting point: 530°C; 425°C (decomposes)
  • Boiling point:
  • Density: 2910 kg m-3

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Element analysis

Element percentages for the elements in dirubidium sulphide
Element %
Rb 84.20
S 15.80

Synthesis

One way to make rubidium sulphide is to reduce the sulphate with carbon.

Rb2SO4(s) + 2C(s) → Rb2S(s) + 2CO2(g)

Solid state structure

  • Geometry of rubidium: 4 coordinate: tetrahedral
  • Prototypical structure:

Crystal structure of dirubidium sulphide

Isotope pattern

What follows is the calculated isotope pattern for the Rb2S unit with the most intense ion set to 100%.

Formula: Rb2S1

mass  %
202 100.0 __________________________________________________
203 0.8
204 81.6 _________________________________________
205 0.6
206 18.3 _________
207 0.1
208 0.7
209 0.0
210 0.0

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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rubidium atomic number