710. Antimony Triiodide

Nomenclature

CAS number: 7790-44-5
Triiodostibine.
I3Sb; mol wt 502.47.
I 75.77%, Sb 24.23%.
SbI3.

Description and references

Prepd by the interaction of antimony and iodine in boiling benzene or tetrachloroethane: Bailar, Cundy, Inorg. Synth. 1, 104 (1939); Scattergood, J. Chem. Educ. 20, 40 (1943).

Properties

Ruby-red, trigonal crystals (yellowish-green modifications have been observed). d417 4.921. The tendency to sublime becomes noticeable at 100°. mp 168°. bp 420°. Critical temp 1101°; crit press. 55 atm. Dipole moment: 1.58. Dec by water and air to SbOI (antimony oxyiodide). Sol in alcohol, acetone, carbon disulfide, HCl, soln of KI. Insol in carbon tetrachloride.