Thulium (III) iodide

Crystal structure
	__ Tm 3+ __ I -
General
Surname	Thulium (III) iodide
other names	Thulium triiodide
Ratio formula	TmI 3
Brief description	yellow solid
External identifiers / databases
EC number	237-472-4
ECHA InfoCard	100.034.052
PubChem	83750
Wikidata	Q16857503
properties
Molar mass	549.65 g mol −1
Physical state	firmly
Melting point	1015 ° C
boiling point	1260 ° C
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-280-305 + 351 + 338-304 + 340-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thulium (III) iodide is an inorganic chemical compound of thulium from the group of iodides .

Extraction and presentation

Thulium (III) iodide can be obtained by reacting thulium with iodine .

{\ displaystyle \ mathrm {2 \ Tm + 3 \ I_ {2} \ longrightarrow TmI_ {3}}}

It is also possible to display it by reacting thulium with mercury (II) iodide in a vacuum at 500 ° C.

{\ displaystyle \ mathrm {2 \ Tm + 3 \ HgI_ {2} \ longrightarrow 2 \ TmI_ {3} +3 \ Hg}}

Thulium (III) iodide hydrate can be converted to the anhydrate by dehydration with a large excess of ammonium iodide (as the compound is prone to hydrolysis ).

properties

Thulium (III) iodide is a yellow, strongly hygroscopic solid with a crystal structure of the bismuth (III) iodide type. In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is easily formed at elevated temperatures.

use

Thulium (III) iodide is used as a component in metal halide lamps .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1077.
↑ ^a ^b ^c ^d ^e data sheet Thulium (III) iodide, ultra dry, 99.99% (REO) from AlfaAesar, accessed on April 26, 2014 ( PDF )(JavaScript required) .
^ Peter G. Flesch: Light and Light Sources: High-Intensity Discharge Lamps . Springer, 2007, ISBN 3-540-32685-5 , pp. 45 ( limited preview in Google Book search).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1077.

[Alfa-2] ↑ ^a ^b ^c ^d ^e data sheet Thulium (III) iodide, ultra dry, 99.99% (REO) from AlfaAesar, accessed on April 26, 2014 ( PDF )(JavaScript required) .

[Peter_G._Flesch-3] Peter G. Flesch: Light and Light Sources: High-Intensity Discharge Lamps . Springer, 2007, ISBN 3-540-32685-5 , pp. 45 ( limited preview in Google Book search).