A black, gray, or brown mineral that consists mainly of uranium dioxide and is the chief ore of uranium.pitchblende is a variety of uraninite.
More example sentences
- Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
- Other accessory minerals are apatite, zircon, monazite, huttonite and rare xenotime, uraninite and betafite.
- A comprehensive discussion of the mineralogy and occurrence of uraninite has been given by Frondel, to which the reader is strongly referred.
Definition of uraninite in:
- The British & World English dictionary