Sayrite (Pb<sub>2</sub>(UO<sub>2</sub>)<sub>5</sub>O<sub>6</sub>(OH)<sub>2</sub>4(H<sub>2</sub>O)) is an alteration product of uraninite named after the X-ray crystallographer David Sayre. Sayrite contains hydrogen, oxygen, uranium and lead. It is mined at Shinkolobwe Mine, (Kasolo Mine), Kambove District, Haut-Katanga, Democratic Republic of the Congo. It is usually orange in color but also can be reddish and yellowish and is in the monoclinic crystal system.