Zippeite
A variety of Zippeite Group
What is Zippeite?
Zippeite is a hydrous potassium uranium sulfate mineral with formula: K4(UO2)6(SO4)3(OH)10·4(H2O). It forms yellow to reddish brown monoclinic-prismatic crystals with perfect cleavage. The typical form is as encrustations and pulverulent earthy masses. It forms as efflorescent encrustations in underground uranium mines. It has a Mohs hardness of 2 and a specific gravity of 3.66. It is strongly fluorescent yellow under ultraviolet light and is moderately radioactive.
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Quick Facts
Physical Properties
- Color
- Golden yellow, light yellow, orange-yellow
- Hardness (Mohs)
- 2
- Density
- 4.794 g/cm³
- Streak
- White, yellow
Chemical Properties
- Chemical Formula
- K3(UO2)4(SO4)2O3(OH) · 3H2O
- Elements
- H, K, O, S, U
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