What is "spriggite"

n. (context mineralogy English) A monoclinic-prismatic bright orange mineral containing barium, calcium, hydrogen, lead, oxygen, and uranium.

Spriggite is an uranyl hydroxide mineral with chemical formula Pb(UO)O(OH)·3HO. Its type locality is Mt Painter region, Arkaroola region, Flinders Ranges, South Australia. It was named after Reginald C. Sprigg (1919–1994).