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Cejkaite: Na4(UO2)(CO3)3
Comments: Yellow chalky cejkaite masses on matrix. Location: Svornost Mine, Jáchymov, Ostrov, Krusne Hory Mts (Erzgebirge), Bohemia, Czech Republic. Scale: Picture Size 0.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species