Dysprosium(III) iodide

Dysprosium(III) iodide is a binary inorganic compound of dysprosium and iodine with the chemical formula DyI
₃.

Synthesis

Dysprosium(III) iodide can be obtained by reacting dysprosium with iodine.

2Dy + 3I → 2DyI₃

Dysprosium(III) iodide can be obtained using the effect of mercury diiodide on dysprosium filings:

2Dy + 3HgI₂ → 2DyI₃ + 3Hg

Physical properties

Dysprosium(III) iodide is a hygroscopic yellow-green flaky solid that is soluble in water. The compound has a trigonal crystal structure of the bismuth(III) iodide type with the space group R3.

Uses

Dysprosium(III) iodide is used in gas discharge lamps to generate white light.

References