What is "phosphuranylite"

n. (context mineralogy English) An orthorhombic-dipyramidal mineral containing calcium, hydrogen, oxygen, phosphorus, potassium, and uranium.

Phosphuranylite is a uranyl phosphate mineral with formula KCa(HO)(UO)(PO)O·8(HO).

It was first described in 1879 by Frederick Augustus Genth, from an occurrence in the Flat Rock pegmatite in Mitchell County, North Carolina, US.