1) Potassium mineral 2) Uranium mineral
Found on
https://www.crosswordclues.com/clue/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 ...
Found on
http://en.wikipedia.org/wiki/Zippeite
(Hydrated Potassium Uranyl Sulfate Hydroxide) Zippeite is a rare mineral but is sought after by collectors who seek uranium bearing minerals as well as minerals that have exotic names. Zippeite fluoresces under ultraviolet light. The mineral is inconsistent however in the color that is produced. Zippeite is formed as a secondary...
Found on
https://www.encyclo.co.uk/local/23719
No exact match found.
