Nbmineralen
Nbmineralen is a term that refers to minerals containing niobium. Niobium, also known as columbium, is a chemical element with the symbol Nb and atomic number 41. It is a soft, ductile, silvery-gray, and rarely found in nature as a pure mineral. Instead, it is primarily found in oxide minerals.
The most commercially important niobium-bearing minerals are pyrochlore and columbite. Pyrochlore is a complex oxide mineral
These minerals are often found in igneous rocks, particularly in alkaline intrusions and carbonatites. Niobium is