Margaritasite
From Wikipedia, the free encyclopedia
Margaritasite is a yellow, caesium-bearing mineral in the carnotite group; its chemical formula is (Cs,K,H3O)2(UO2)2V2O8.H2O and its crystal system is monoclinic. It was first described in 1982 from the Margaritas uranium deposit, Pena Blanca district, Chihuahua, Mexico.