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Gadolinium(III) fluoride

Names
IUPAC name Gadolinium(III) fluoride
Other names Gadolinium trifluoride Gadolinium fluoride
Identifiers
CAS Number	13765-26-9
3D model (JSmol)	Interactive image
ChemSpider	75538
ECHA InfoCard	100.033.958
EC Number	237-369-4
PubChem CID	10176739
CompTox Dashboard (EPA)	DTXSID8065618
InChI InChI=1S/3FH.Gd/h3*1H;/q;;;+3/p-3Key: TYIZUJNEZNBXRS-UHFFFAOYSA-K
SMILES F(F)F
Properties
Chemical formula	GdF3
Related compounds
Other anions	Gadolinium(III) chloride Gadolinium(III) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Gadolinium(III) fluoride is an inorganic compound with a chemical formula GdF₃.

Preparation

Gadolinium(III) fluoride can be prepared by heating gadolinium oxide and ammonium bifluoride. The reaction involves two steps:

Gd₂O₃ + 6 NH₄HF₂ → 2 NH₄GdF₄ + 4 NH₄F + 3 H₂O

NH₄GdF₄ → GdF₃ + NH₃ + HF

Alternatively, reacting gadolinium chloride with hydrofluoric acid and adding hot water produces GdF₃·xH₂O (x＝0.53). Anhydrous gadolinium(III) fluoride can then be produced by heating the hydrate with ammonium bifluoride; without the bifluoride, GdOF is formed instead.

GdCl₃ + 3 HF + x H₂O → GdF₃·xH₂O + 3 HCl

Properties

Gadolinium(III) fluoride is a white solid that is insoluble in water. It has an orthorhombic crystal structure with the space group Pnma (space group no. 62).

Uses

Gadolinium(III) fluoride is used to produce fluoride glasses.

References

1. 郝占忠. 氟化氢铵氟化法合成氟化钆过程的基础研究. 材料科学与工艺, 2010, 18(5):653-656.(in Chinese)
2. 郝占忠, 王斌. Gd₂O₃－NH₄HF₂系制备氟化钆机制及工艺研究. 稀有金属, 2007, 31(1):97-101.(in Chinese)
3. 郝占忠. 湿法氟化制备水合氟化钆的脱水机制及其氧的行为. 有色金属(冶炼部分), 2010(5):36-39. (in Chinese)
4. Ans, Jan d'; Ans, Jan d' (1998). Elemente, anorganische Verbindungen und Materialien. Taschenbuch für Chemiker und Physiker / D'Ans (4., neubearb. u. rev. Aufl ed.). Ort nicht ermittelbar: Verlag nicht ermittelbar. ISBN 978-3-540-60035-0.
5. "Gadolinium(III) fluoride". Thermo Scientific Chemicals.

• Gadolinium compounds
• Fluorides
• Lanthanide halides