Gadolinium(III) iodide

Gadolinium(III) iodide
Identifiers
CAS Number	13572-98-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	75418;
ECHA InfoCard	100.033.619
EC Number	236-997-6;
PubChem CID	25212328;
CompTox Dashboard (EPA)	DTXSID2065543 ;
	InChI InChI=1S/Gd.3HI/h;3*1H/q+3;;;/p-3 Key: IZZTUGMCLUGNPM-UHFFFAOYSA-K;
	SMILES [I-].[I-].[I-].[Gd+3];
Properties
Chemical formula	GdI3
Molar mass	537.96 g/mol−1
Appearance	yellow solid
Melting point	926 °C
Boiling point	1340 °C
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H317, H360
Precautionary statements	P201, P280, P308+P313
Related compounds
Other anions	Gadolinium(III) fluoride; Gadolinium(III) chloride; Gadolinium(III) bromide
Other cations	Europium(III) iodide; Terbium(III) iodide; Samarium(III) iodide
Related compounds	Gadolinium(II) iodide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Gadolinium(III) iodide is an iodide of gadolinium, with the chemical formula of GdI₃. It is a yellow, highly hygroscopic solid with a bismuth(III) iodide-type crystal structure. In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is also readily formed at elevated temperature.^[2]

Preparation

Gadolinium(III) iodide can be obtained by reacting gadolinium with iodine:^[2]

2 Gd + 3 I₂ → 2 GdI₃

It can also be obtained by reacting gadolinium with mercury(II) iodide in a vacuum at 500 °C:^[2]

2 Gd + 3 HgI₂ → 2 GdI₃ + 3 Hg

Gadolinium(III) iodide can be obtained by the reaction between gadolinium(III) oxide and hydroiodic acid, crystallizing into the hydrate form. The hydrate form can be heated with ammonium iodide to form the anhydrous form.^[2]^[3]

Gd₂O₃ + 6 HI → 2 GdI₃ + 3 H₂O

Reactions

Gadolinium(III) iodide reacts with gadolinium and zinc in an argon atmosphere heated to 850 °C to obtain Gd₇I₁₂Zn.^[4] It reacts with gadolinium, carbon, and gadolinium nitride in a tantalum tube at 897 °C to obtain nitrocarbide Gd₄I₆CN.^[5]

References

^ ^a ^b ^c Sigma-Aldrich Co., product no. {{{id}}}.
^ ^a ^b ^c ^d ^e Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1077.
^ Kutscher, J.; Schneider, A. Preparation of anhydrous lanthanide halides, especially iodides. Inorganic and Nuclear Chemistry Letters, 1971. 7 (9): 815-819.
^ Mar’yana Lukachuk, Lorenz Kienle, Chong Zheng, Hansjürgen Mattausch, Arndt Simon (2008-06-02). "Gd 7 I 12 Zn: A Group 12 Atom in the Octahedral Gd 6 Cluster". Inorganic Chemistry. 47 (11): 4656–4660. doi:10.1021/ic800024n. ISSN 0020-1669. PMID 18426200. Archived from the original on 2022-04-23. Retrieved 2022-07-08.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ Mattausch, Hansjurgen; Borrmann, Horst; Eger, Roland; Kremer, R. K.; Simon, Arndt. Gd₄I₆CN: A carbide nitride with chains of Gd₆(C₂) octahedra and Gd₆N₂ double tetrahedra. Zeitschrift fuer Anorganische und Allgemeine Chemie (1994), 620 (11): 1889-1897.

External reading

Asprey, L. B.; Keenan, T. K.; Kruse, F. H. Preparation and crystal data for lanthanide and actinide triiodides. Inorg. Chem., 1964. 3 (8): 1137-1240

[Sigma-1] Sigma-Aldrich Co., product no. {{{id}}}.

[brauer-2] Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1077.

[3] Kutscher, J.; Schneider, A. Preparation of anhydrous lanthanide halides, especially iodides. Inorganic and Nuclear Chemistry Letters, 1971. 7 (9): 815-819.

[4] Mar’yana Lukachuk, Lorenz Kienle, Chong Zheng, Hansjürgen Mattausch, Arndt Simon (2008-06-02). "Gd 7 I 12 Zn: A Group 12 Atom in the Octahedral Gd 6 Cluster". Inorganic Chemistry. 47 (11): 4656–4660. doi:10.1021/ic800024n. ISSN 0020-1669. PMID 18426200. Archived from the original on 2022-04-23. Retrieved 2022-07-08.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[5] Mattausch, Hansjurgen; Borrmann, Horst; Eger, Roland; Kremer, R. K.; Simon, Arndt. Gd₄I₆CN: A carbide nitride with chains of Gd₆(C₂) octahedra and Gd₆N₂ double tetrahedra. Zeitschrift fuer Anorganische und Allgemeine Chemie (1994), 620 (11): 1889-1897.

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