- Formula: SeO2
- Hill system formula: O2Se1
- CAS registry number: [7446-08-4]
- Formula weight: 110.959
- Class: oxide
- Colour: white
- Appearance: crystalline solid
- Melting point: 340°C
- Boiling point: 315°C
- Density: 3950 kg m-3
The following are some synonyms of selenium dioxide:
- selenium dioxide
- selenium(IV) oxide
- selenium oxide
The oxidation number of selenium in selenium dioxide is 4.
Selenium(IV) dioxide is formed by the combustion of elemental selenium in a mixture of oxygen and nitrogen dioxide. The yield is about 80%. Selenium(IV) dioxide is a white crystalline material that melts at 340°C.
Solid state structure
- Geometry of selenium:
- Prototypical structure:
The table shows element percentages for SeO2 (selenium dioxide).
Isotope pattern for SeO2
The chart below shows the calculated isotope pattern for the formula SeO2 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.