Gadolinium (III) iodide

Crystal structure
__ Gd 3+      __ I -
General
Surname	Gadolinium (III) iodide
other names	Gadolinium triiodide
Ratio formula	GdI 3
Brief description	yellow solid
External identifiers / databases
CAS number 13572-98-0 EC number 236-997-6 ECHA InfoCard 100.033.619 PubChem 83588 Wikidata Q15628352
properties
Molar mass	537.96 g mol −1
Physical state	firmly
Melting point	926 ° C
boiling point	1340 ° C
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 317-360 P: 201-280-308 + 313
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Gadolinium (III) iodide is an inorganic chemical compound of gadolinium from the group of iodides .

Extraction and presentation

Gadolinium (III) iodide can be obtained by reacting gadolinium with iodine .

${\displaystyle \mathrm {2\ Gd+3\ I_{2}\longrightarrow GdI_{3}} }$

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

${\displaystyle \mathrm {2\ Gd+3\ HgI_{2}\longrightarrow 2\ GdI_{3}+3\ Hg} }$

Gadolinium (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

Gadolinium (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 also easily formed at elevated temperatures.

Individual evidence

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.
2. ↑ ^{a b c d} data sheet Gadolinium (III) iodide, anhydrous, powder, 99.99% trace metals basis from Sigma-Aldrich , accessed on April 26, 2014 ( PDF ).