| The Lithium perchlorate, LiClO4 is prepared by neutralizing perchloric acid with lithium carbonate, evaporating to dryness, extracting with alcohol, and concentrating the alcoholic solution. From aqueous solution the trihydrate, LiClO4,3H2O, crystallizes. It melts at 95° C., passes into the monohydrate at 98° to 100° C., and into the anhydrous salt at 130° to 150° C. The anhydrous salt melts at 236° C., and is converted with evolution of oxygen into the chlorate and chloride above 380° C. Between 410° C. and 430° C. the decomposition is slow, but it becomes rapid at 450° C. |