出典:Wiktionary
F X M Zippe, Prague mineralogist, and -ite.
zippeite (countable かつ uncountable, 複数形 zippeites)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/20 11:33 UTC 版)
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 in UV radiation and is a radioactive mineral.