from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A rare yellow radioactive calcium uranium silicate hydrate mineral that forms from the oxidation of uranium-bearing minerals.
from The Century Dictionary and Cyclopedia
- n. A hydrous silicate of uranium and calcium which occurs in radiated aggregates of acicular crystals having a bright yellow color: probably the same mineral as uranotil.
The principal ore mineral is uranophane, a hydrated calcium-uranium silicate, which is believed to be an oxidation product of pitchblende.
Several meter thick pegmatitic granite dykes hosting uraninite, uranophane and apatite were also observed by IOS geologists.
Mineralization consists of disseminated fine grained uraninite (locally uranophane) in granitic altered rocks with smoky quartz and apatite and associated biotite altered zones.