Uranotungstite

General Information: Chemical Formula:(Fe++,Ba,Pb)(UO2)2WO4(OH)4·12(H2O) IMA Status:Approved IMA Locality:Menzenschwand, and Clara mine, Wolfach, Schwarzwald, Baden-Wurttenberg, Germany. Name Origin:Named for the composition.Physical Properties: Cleavage:[010] Perfect Color:brownish, yellow, yellow brown, or orange. Density:4.27 Diaphaniety:Translucent Habits:Microscopic Crystals - Crystals visible only with microscopes., , Hardness:2 - Gypsum Luminescence:Non-fluorescent. Luster:Earthy (Dull) Streak:yellowMore details...

(Ba,Pb,Fe)( O2)2(WO4)(OH)4 12(H2O)