Uranophane
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Uranophane (Ca(UO2)2(SiO3OH)2·5H2O), also known as uranotile, is a rare calcium uranium silicate hydrate mineral that forms from the oxidation of other uranium-bearing minerals. It has a yellow color and is radioactive.
Alice Mary Weeks, and Mary E. Thompson of the United States Geological Survey, identified uranophane in 1953.<ref>Template:Cite book</ref>
Classic samples have been produced at Madawaska Mine near Bancroft, Ontario.<ref>Template:Cite journal</ref>