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Metauranopilite: (UO2)6(SO4)(OH)10·5(H2O)
Comments: Orange-brown aggregates of metauranopilite with yellow green johannite on matrix. Unless sealed in glass, all uranopilite specimens should be considered to have become metauranopilite within a few months of being exposed to ambient air. Location: Apex Mine, Lander Co., Nevada, USA. Scale: See Image. © Paul M. Schumacher