Dirubidium sulphide

Rubidium compounds: dirubidium sulphide

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

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:

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	Rubidium
Rubidium	Rubidium
Rubidio	Rubidio
Rubidium	Rubídio