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Erbium(III) fluoride
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<p>Erbium(III) fluoride is the <a href="/facts/Fluoride/LpqNMzwa">fluoride</a> of <a href="/facts/Erbium/XEJlgJcx">erbium</a>, a rare earth metal, with the <a href="/facts/Chemical_formula/hghUtthl">chemical formula</a> ErF3. It can be used to make infrared light-transmitting materials and up-converting luminescent materials. </p>