from The Century Dictionary.

  • noun A basic sulphate of uranium, occurring in delicate needle-like crystals of a bright-yellow color: it is found at Joachimsthal.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy 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.


from Wiktionary, Creative Commons Attribution/Share-Alike License

F X M Zippe, Prague mineralogist, and -ite.


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  • If I were a mineral, I'd want to be called this.

    August 26, 2009