uraninite
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Introduction
A mineral that is basically a black octahedral or cubic oxide UO2 of uranium. It also contains thorium, cerium, yttrium & lead. When heated, uraninite yields a gas consisting chiefly of helium. Uraninite is the chief ore of uranium.
References
- ↑ Webster's Ninth New Collegiate Dictionary, Miriam- Webster Inc. Springfield, MA 1990