Yttrium(III) fluoride

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Yttrium(III) fluoride
Yttrium(III) fluoride
CAS number 13709-49-4 YesY
PubChem 83679
ChemSpider 75502 YesY
Jmol-3D images Image 1
Molecular formula YF3
Molar mass 145.90 g mol−1
Appearance white powder
Density 4.01 g cm−3
Melting point 1,387 °C (2,529 °F; 1,660 K)
Boiling point 2,230 °C (4,050 °F; 2,500 K)
Solubility in water insoluble
Solubility in acid soluble
Refractive index (nD) 1.51 (500 nm)
Crystal structure Orthorhombic, oP16, SpaceGroup = Pnma, No. 62
EU Index Not listed
Flash point Non-flammable
Related compounds
Other anions Yttrium(III) chloride
Yttrium(III) bromide
Yttrium(III) iodide
Other cations Scandium(III) fluoride
Lanthanum(III) fluoride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Yttrium(III) fluoride is an inorganic chemical compound with the chemical formula YF3. It is not known naturally in 'pure' form. The fluoride minerals containing essential yttrium include tveitite-(Y) (Y,Na)6Ca6Ca6F42 and gagarinite-(Y) NaCaY(F,Cl)6. Sometimes mineral fluorite contains admixtures of yttrium.


YF3 can be produced by reacting fluorine with yttria or yttrium hydroxide with hydrofluoric acid.

Y(OH)3 + 3HF → YF3 + 3H2O


Yttrium(III) fluoride can be used for the production of metallic yttrium, thin films, glasses and ceramics.


Conditions/substances to avoid are: acids, active metals and moisture.