Uranophane
| streak = Yellowish white | diaphaneity = Translucent to subtranslucent | gravity = 3.81 - 3.90 | density = | polish = | opticalprop = Biaxial (-) | refractive = nα = 1.643 nβ = 1.666 nγ = 1.669 | birefringence = δ = 0.026 | pleochroism = Weak; X = colorless; Y = pale canary-yellow; Z = canary-yellow | 2V = 32° to 45°, measured | dispersion = | extinction = | length fast/slow = | fluorescence = Weak yellow-green under both short and long UV | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = Radioactive | prop1 = | prop1text = | references = [1][2][3] }}
Uranophane Ca(UO2)2(SiO3OH)2·5H2O is a rare calcium uranium silicate hydrate mineral that forms from the oxidation of uranium bearing minerals. Uranophane is also known as uranotile. It has a yellow color and is radioactive.
References
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