Cerium(III) iodide (CeI₃) is the compound formed by

cerium Cerium is a chemical element with the symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the +3 ...

(III) cations and

iodide An iodide ion is the ion I−. Compounds with iodine in formal oxidation state −1 are called iodides. In everyday life, iodide is most commonly encountered as a component of iodized salt, which many governments mandate. Worldwide, iodine de ...

anions.

Preparation

Cerium metal reacts with iodine when heated to form cerium(III) iodide: : It is also formed when cerium reacts with mercury(II) iodide at high temperatures: :

Structure

Cerium(III) iodide adopts the plutonium(III) bromide crystal structure. It contains 8-coordinate bicapped trigonal prismatic Ce³⁺ ions.

Uses

Cerium(III) iodide is used as a pharmaceutical intermediate and as a starting material for organocerium compounds.

References

{{Lanthanide halides Cerium(III) compounds Iodides Lanthanide halides