Used in welding fluxes to improve arc stability and reduce spatter in electrode coatings. Acts as a source of fluoride ions in metallurgical processes for refining aluminum and magnesium alloys. Employed in the production of specialized glasses and ceramics due to its low refractive index and transparency to ultraviolet and infrared radiation. Serves as a scintillation material in radiation detectors for nuclear and particle physics. Utilized in some types of lubricants and greases for high-temperature applications. Also found in certain dental cements and enamels for enhanced durability.