Lithium permanganate is an inorganic compound with the chemical formula LiMnO<sub>4</sub>. It can be produced by the reaction of lithium sulfate and barium permanganate, and the trihydrate LiMnO<sub>4</sub>÷3H<sub>2</sub>O can be crystallized from the solution. It decomposes violently at 199 ðC to a mixture of spinel salts: