- Formula: SbI3
- Hill system formula: I3Sb1
- CAS registry number: [7790-44-5]
- Formula weight: 502.473
- Class: iodide
- Colour: red
- Appearance: crystalline solid
- Melting point: 170.5°C
- Boiling point: 401°C
- Density: 4920 kg m-3
The following are some synonyms of antimony triiodide:
- antimony triiodide
- antimony(III) iodide
- antimony iodide
The oxidation number of antimony in antimony triiodide is 3.
2Sb + 3I2 → 2SbI3
Antimony(III) triiodide forms in the direct reaction between the elements but the reaction is very violent. The reaction is much more controlled when iodine is added to a boiling suspension of antimony powder in benzene. The product antimony(III) triiodide crystallizes directly out of the reaction mixture as red crystals. The yield is about 80%. Antimony (III) triiodide is red and melts at 166°C. Its boiling point is 400°C. It hydrolyses rapidly in water.
Solid state structure
- Geometry of antimony:
- Prototypical structure:
The table shows element percentages for SbI3 (antimony triiodide).
Isotope pattern for SbI3
The chart below shows the calculated isotope pattern for the formula SbI3 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.