thorianite
(noun)
noun
1. (mineralogy) A radioactive mineral containing thorium dioxide (ThO2) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.
(noun)
1. (mineralogy) A radioactive mineral containing thorium dioxide (ThO2) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.