The chemical symbol for niobium is Nb. Main physical properties of niobium: Electronic structure: [Kr] 4d45s1 Atomic mass: 92,90638 u ± 0,00002 u Number: 41 Melting point: 2 469 ° CA Applications of niobium: Used in the construction of steels and turbines. Niobium-based magnets are also used in the crease accelerator.