Scandium triiodide

• Scandium (III ) iodide
• Scandiumtriiodid

Yellow solid

Fixed

4.65 g · cm -3

920 ° C.

Risk

Template: Infobox chemical / molecular formula search available

Scandium is an inorganic chemical compound of scandium from the group of iodides.

Production and representation

Scandium can be obtained directly by reaction of scandium with iodine.

Properties

Scandium is a moisture- sensitive yellow solid. He has a trigonal crystal system corresponding to that of bismuth triiodide with the space group R3.

Use

Scandium iodide is used as an additive for special mercury vapor lamps, which reproduce the spectrum of sunlight well. The connection only arises in the lamps. About 5 mg of scandium are added per lamp. In the automotive lighting ( mercury-free Xe lamp ) is used since at least 1994 scandium to the EU Directive 2000/53/EC to implement the long term. It can also be used as a mild Lewis acid in organic syntheses.