| M Formula: | NbC |
| Properties: | |
| Lavender-gray powder. Mp approximately 3500C, d 7.82. Insoluble in water and in all acids except a mixture of nitric acid and hydrogen fluoride. | |
| Derivation: | |
| By direct combination of niobium with carbon or by the reduction of niobium oxide with lampblack. | |
| Use: | |
| Cemented carbide tipped tools, special steels, preparation of niobium metal, coating graphite for nuclear reactors. | |