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Gadolinium(III) fluoride

Chemical compound From Wikipedia, the free encyclopedia

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

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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
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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

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