ما هو
The niobium mineral of carbonatite deposits, and the reason niobium supply is so geographically concentrated.
المواد المستخرجة منه
| المادة | الدور | ملاحظة حول الدرجة |
|---|---|---|
| Niobium | Principal ore | — |
معدن الخام
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
