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Definition of Zippeite
1. Noun. (minerology) A hydrous potassium uranium sulfate mineral with chemical formula K4(UO2)6(SO4)3(OH)10·4(H2O), forming yellow to reddish-brown monoclinic-prismatic crystals with perfect cleavage and formerly used in the manufacture of paint. ¹
¹ Source: wiktionary.com