Phosphuranylite is a uranyl phosphate mineral with formula KCa(H<sub>3</sub>O)<sub>3</sub>(UO<sub>2</sub>)<sub>7</sub>(PO<sub>4</sub>)<sub>4</sub>O<sub>4</sub>÷8(H<sub>2</sub>O).
It was first described in 1879 by Frederick Augustus Genth, from an occurrence in the Flat Rock pegmatite in Mitchell County, North Carolina, US.