General Information:
Chemical Formula:Ca(UO2)2SiO3(OH)2·5(H2O)
Composition:(Molecular Weight = 586.36 gm)Calcium 6.84 %
CaUranium 40.59 %
U Silicon 9.58 %
SiHydrogen 2.06 %
H Oxygen 40.93 %
O Empirical Formula: CaH2(SiO4)2(UO2)·5(H2O)
Environment:Alteration procduct of gummite.
Locality:Oberpfalz, Bavaria.
Name Origin:From uran and phanos - "to appear."
Physical Properties: Cleavage:[100] Perfect
Color:yellow, yellow brown, yellow green, yellow orange, or light yellow.
Density:3.9
Diaphaniety:Translucent to subtranslucent
Habits:Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Mass ive - Fibrous - Distinctly fibrous fine-
Hardness:2.5 - Finger Nail
Luminescence:None.
Luster:Vitreous (Glassy)
Streak:yellowish white
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