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 mineralwith chemical formula K4(UO2)6(SO4)3(OH)10·4(H2O), forming yellow to reddish-brown monoclinic- prismatic crystalswith perfect cleavageand formerly used in the manufacture of paint.
from Wiktionary, Creative Commons Attribution/Share-Alike License
F X M Zippe, Prague mineralogist, and -ite.