Wiktionary
n. (context chemistry English) a salt that may be prepared by the action of hydrofluoric acid on many lithium compounds, and occurs naturally as griceite; its crystals are used in optical instruments, and in radiation dosimetry (based on its radiothermoluminescence)
Wikipedia
Lithium fluoride is an inorganic compound with the chemical formula LiF. It is a colorless solid, that transitions to white with decreasing crystal size. Although odorless, lithium fluoride has a bitter-saline taste. Its structure is analogous to that of sodium chloride, but it is much less soluble in water. It is mainly used as a component of molten salts. Formation of LiF releases one of the highest energy per mass of reactants, only second to that of BeO.
Usage examples of "lithium fluoride".
Aurbach, Nonaqueous Electrochemistry, 503) A typical electrolyte is 2-8% alumina, 5-7% calcium fluoride, 5-7% excess aluminum fluoride, 0-7% lithium fluoride, and 80-85% cryolite.