Uraninite,a radioactive mineral,an oxide of uranium often with oxides of lead,thorium and rare earth metals included. Also called pitchblende due to its black appearance. An important ore of uranium mined in Congo,South Africa,Australia and Canada. From Weissen Hirsch mine,Erzgebirge mountains,Germany | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
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