Gadolinium(III) fluoride

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

Gadolinium(III) fluoride

Names
IUPAC name Gadolinium(III) fluoride
Other names Gadolinium trifluoride Gadolinium fluoride
Identifiers
CAS Number	13765-26-9 Y
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-3 Key: TYIZUJNEZNBXRS-UHFFFAOYSA-K
SMILES F[Gd](F)F
Properties
Chemical formula	GdF3
Appearance	White crystalline powder
Density	7.09 g/cm3
Melting point	1,372 °C (2,502 °F; 1,645 K)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
NFPA 704 (fire diamond)	1 0 0
Safety data sheet (SDS)	Safety Data Sheet
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 [77 °F], 100 kPa). Infobox references

Preparation

Gadolinium(III) fluoride can be prepared by heating gadolinium oxide and ammonium bifluoride. The reaction involves two steps:^[1][2]

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.^[3]

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).^[4]

Uses

Gadolinium(III) fluoride is used to produce fluoride glasses.^[5]