Gadolinium diiodide

Crystal structure
	__ Gd 2+ __ I -
General
Surname	Gadolinium diiodide
other names	Gadolinium diiodide
Ratio formula	GdI 2
Brief description	bronze colored solid
External identifiers / databases
Wikidata	Q16831506
properties
Molar mass	411.06 g mol −1
Physical state	firmly
Melting point	831 ° C
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Gadolinium diiodide is an inorganic chemical compound of gadolinium from the group of iodides .

Extraction and presentation

Gadolinium diiodide can be obtained by reducing gadolinium (III) iodide with gadolinium in a vacuum at 800 ° C to 900 ° C.

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

It can also be represented by the reaction of gadolinium with mercury (II) iodide .

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

properties

Gadolinium diiodide is an opaque, dark, compact solid with a strong gloss and a metal-like appearance and character. Therein gadolinium is trivalent according to Gd ³⁺ (I ^- ) ₂ e ^- . The connection is extremely hygroscopic and can only be stored and handled under carefully dried protective gas or in a high vacuum. In air it changes into hydrates with moisture absorption , but these are unstable and more or less quickly turn into oxide iodides with evolution of hydrogen . These processes take place much faster with water. The compound has a crystal structure of the 2H molybdenum (IV) sulfide type.

Individual evidence

^ ^A ^b William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–64 ( limited preview in Google Book Search).
↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ Ralf Alsfasser, Erwin Riedel: Modern Inorganic Chemistry . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 366 ( limited preview in Google Book search).

[William_M._Haynes-1] A ^b William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2012, ISBN 1-4398-8049-2 , pp. 4–64 ( limited preview in Google Book Search).

[brauer-2] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Ralf_Alsfasser,_Erwin_Riedel-4] Ralf Alsfasser, Erwin Riedel: Modern Inorganic Chemistry . Walter de Gruyter, 2007, ISBN 3-11-019060-5 , p. 366 ( limited preview in Google Book search).