Lithium compounds: lithium superoxide

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The lithium in lithium superoxide formally is in the oxidation state 1.

Lithium superoxide

  • Formula as often written: LiO2
  • Hill system formula: Li1O2
  • CAS registry number: [12136-56-0]
  • Formula weight: 38.94
  • Class: oxide

Synonyms

  • lithium superoxide
  • lithium(I) superoxide

Physical properties

  • Colour: yellow
  • Appearance: crystalline solid
  • Melting point: <25°C (decomposes)
  • Boiling point:
  • Density:

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Element analysis

Element percentages for the elements in lithium superoxide
Element %
Li 17.82
O 82.18

Synthesis

Isolated only in matrix isolation experiments at 15 K.

Isotope pattern

What follows is the calculated isotope pattern for the LiO2 unit with the most intense ion set to 100%.

Formula: Li1O2

mass  %
38   8.1 ____
39 100.0 __________________________________________________
40 0.1
41 0.4

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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lithium atomic number