Lithium Fluoride’s unique properties give it several potential applications. Because of its large band gap, crystals of Lithium Fluoride have the highest UV transmission for short wavelength UV radiation making it useful for UV-based optics. Similarly, crystalline Lithium Fluoride can be used as diffracting crystals in x-ray spectrometry. Another common use for Lithium Fluoride (or isotopes thereof) is as a thermoluminescent dosimeter for detecting ionizing radiation from gamma rays, beta particles, and neutrons. Nano-sized Lithium Fluoride with its dielectric constant of 9.0 can also be used in a cathode material for polymer-based LEDs and organic LEDs. Less frequently, isotopes of Lithium Fluoride can be mixed with other compounds, most commonly beryllium, in liquid-fluoride nuclear reactors.
