Indium(III) iodide or indium triiodide is a chemical compound of

indium Indium is a chemical element with the symbol In and atomic number 49. Indium is the softest metal that is not an alkali metal. It is a silvery-white metal that resembles tin in appearance. It is a post-transition metal that makes up 0.21 parts ...

and iodine with the formula InI₃.

Preparation

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

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 X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles ...

; however, spectroscopic evidence indicates that indium may be six coordinate.Taylor M. J., Kloo L. A. Journal of Raman Spectroscopy 31, 6, (2000), 465 The yellow form consists of In₂I₆ with 4 coordinate indium centres. Indium(III)-iodide-3D-balls

References

Iodides Indium compounds Metal halides {{Inorganic-compound-stub