General Information:
Chemical Formula:Bi2U2O9·3(H2O)
Composition:(Molecular Weight = 1,092.06 gm)Uranium 43.59 %
U Bismuth 38.27 %
BiHydrogen 0.55 %
H Oxygen 17.58 %
O Empirical Formula: Bi2U2O9·3(H2O)
Environment:Oxidic zone of "gummite" alteration of uraninite.
Locality:Shinkolobwe, Shaba, Zaire.
Name Origin:Named for the compostition uranium and the Greek for sphere, in allusion to its globular forms.
Physical Properties: Cleavage:[001] Good
Color:orange, red orange, or brick red.
Density:6.36
Habits:Botryoidal - "Grape-like" rounded forms (e.g.. malachite)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite),
Hardness:2-3 - Gypsum-Calcite
Luster:Greasy (Oily)
Streak:yellow
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