Yttrium iodide is a binary inorganic compound, a salt of yttrium and hydroiodic acid with the formula YI3.

[2][3] The compound forms colorless crystals, soluble in water.

Heating yttrium and iodine in an inert atmosphere: 2.

Yttrium iodide forms colorless flaky crystals.

[5] A precursor for YBCO superconducting materials in a lower temperature preparation.