Uranophane
Chemical compound
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Uranophane, 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... Wikipedia
Formula mass: 586.36 g/mol
Ultraviolet fluorescence: Weak yellow-green under both short and long UV
Color: Light yellow, lemon-yellow, honey-yellow, straw-yellow, green-yellow
Crystal class: Sphenoidal (2); (same H-M symbol)
Crystal habit: Crystals occur as stellate needle aggregates; as fibrous crusts, and massive
Crystal system: Monoclinic
Formula (repeating unit): Ca(UO2)22·5H2O