Masuyite is a uranium/lead oxide mineral with formula Pb[(UO<sub>2</sub>)<sub>3</sub>O<sub>3</sub>(OH)<sub>2</sub>]÷3H<sub>2</sub>O.
Masuyite was first described in 1947 for an occurrence in Katanga and named to honor Belgian geologist Gustave Masuy (1905âÂÂ1945).