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.
Yttrium(III) fluoride can be used for the production of metallic yttrium, thin films, glasses and ceramics.
From:http://www.cpd-cpd.com/Ceramic-evaporation-materials/Yttrium%28III%29-fluoride/
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