Coltan, also Columbite, Oka, Quebec.Coltan is a dull black metallic ore from which are extracted the elements niobium and tantalum. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Degginger, Phil |
Taille de l’image : | 6491 px × 3997 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |