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
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.958
EC Number
  • 237-369-4
  • InChI=1S/3FH.Gd/h3*1H;/q;;;+3/p-3
    Key: TYIZUJNEZNBXRS-UHFFFAOYSA-K
  • F[Gd](F)F
Properties
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

Production

Gadolinium(III) fluoride can be produced 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

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)
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