Shumwayite is a rare but relatively simple uranyl sulfate mineral with the formula (UO<sub>2</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>â¢5H<sub>2</sub>O. It was discovered in the Green Lizard and Giveaway-Simplot mines of the White Canyon mining district, San Juan County, Utah, US.
The structure of shumwayite is unique. Somewhat chemically similar natural uranyl sulfates include jáchymovite, metauranopilite and uranopilite.