Samples of thorianite,the principal ore of thorium (as thorium oxide,ThO2) and a source of uranium. It is found mainly in alluvial deposits in Sri Lanka,India and Madagascar | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 4500 px × 4500 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |