Used in the production of optical materials, particularly in infrared (IR) lenses and windows due to its low refractive index and excellent transmission in the ultraviolet (UV) to mid-infrared range. Commonly employed in spectroscopy equipment, laser systems, and thermal imaging devices. Also utilized as a phosphor dopant in certain lighting and display technologies. Plays a role in metallurgy as a flux in aluminum and magnesium refining. Investigated for use in dental products for controlled fluoride release to strengthen enamel.