Gadolinium(III) fluoride

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
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

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: ^{[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]

References

1. 郝占忠. 氟化氢铵氟化法合成氟化钆过程的基础研究[J]. 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[J]. 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[J]. 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.