それが何であるか
The niobium mineral of carbonatite deposits, and the reason niobium supply is so geographically concentrated.
産出素材
| 素材 | 役割 | 品位に関する注記 |
|---|---|---|
| Niobium | Principal ore | — |
鉱石鉱物
Pyrochlore
The niobium mineral of carbonatite deposits, and the reason niobium supply is so geographically concentrated.
Estonian Museum of Natural History Specimen No 202616 photo… ·
Mai Seppel ·
CC BY-SA 4.0
· Wikimedia Commons
