Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus | 
| columbite  | |
|---|---|
| BT | oxides | 
| .niobates | |
| ..niobotantalates | |
| ...columbite | |
| RT | niobium ores | 
| tantalum ores | |
| SN | This term has multiple hierarchies. | 
| Data sets | Publications | Expeditions | Thesaurus | 
| columbite  | |
|---|---|
| BT | oxides | 
| .niobates | |
| ..niobotantalates | |
| ...columbite | |
| RT | niobium ores | 
| tantalum ores | |
| SN | This term has multiple hierarchies. |