Niobium

Niobium, formerly columbium, is a chemical element with symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal, often found in the minerals pyrochlore and columbite.



Atomic Weight:  92.90637
Density:        8.57 g/cm3
Melting Point:  2477 °C
Boiling Point:  4744 °C