Indium(III) iodide

Indium(III) iodide or indium triiodide is a chemical compound of indium and iodine with the formula InI3.

Indium(III) iodide
Names
Other names
Indium triiodide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.475
EC Number
  • 236-839-6
UNII
  • InChI=1S/3HI.In/h3*1H;/q;;;+3/p-3
    Key: RMUKCGUDVKEQPL-UHFFFAOYSA-K
  • [In](I)(I)I
Properties
InI3
Molar mass 495.53
Appearance Yellow solid
Density 4.69 g/cm3
Melting point 210 °C (410 °F; 483 K)
Boiling point 500 °C (932 °F; 773 K)
Related compounds
Other anions
 Indium(III) bromide
Indium(III) chloride
Other cations
 Aluminum iodide
Gallium(III) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Indium(III) iodide is obtained by evaporation of a solution of indium in HI.[1]

Properties

Distinct yellow and red forms are known. The red form undergoes a transition to the yellow at 57 °C. The structure of the red form has not been determined by X-ray crystallography; however, spectroscopic evidence indicates that indium may be six coordinate.[2] The yellow form consists of In2I6 with 4 coordinate indium centres.

Ball-and-stick model of the In2I6 molecule

References
  1. E. Donges (1963). "Indium(III) Iodide". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. pp. 861–2.
  2. Taylor M. J., Kloo L. A. Journal of Raman Spectroscopy 31, 6, (2000), 465



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