Black Friday Sale 2017 - Educational Gifts and Toys
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Nb - Niobium


Atomic Number: 41
Atomic Weight: 92.9064
Element Type: Transition Metal
Crystal Structure: Cubic Body Centered
Melting Point: 2477.0°C = 4490.6°F = 2750.15 K
Boiling Point: 4744.0°C = 8571.2°F = 5017.15 K
Critical Temp: °C = °F = K
Atomic Radius: 2.08 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.34 Å
Electronegativity: 1.6


(Niobe, daughter of Tantalus) Discovered in 1801 by Hatchett in an ore sent to Englandmore than a century before by John Winthrop the Younger, first governor of Connecticut.The metal was first prepared in 1864 by Blomstrand, who reduced the chloride by heating itin a hydrogen atmosphere. The name niobium was adopted by the International Union of Purand Applied Chemicstry in 1950 after 100 years of controversy. Many leading chemicalsocieties and government organizations refer to it by this name. Most metallurgists,leading metal societies, and all but one of the leading U.S. commercial producers,however, still refer to the metal as "columbium."


The element is found in niobite (or columbite), niobite-tantalite, parochlore, andeuxenite. Large deposits of niobium have been found associated with carbonatites(carbon-silicate rocks), as a constituent of parochlore. Extensive ore reserves are foundin Canada, Brazil, Nigeria, Zaire, and in Russia.

Science Quote

'I beseech you to take interest in these sacred domains so expressively called laboratories. Ask that there be more and that they be adorned for these are the temples of the future, wealth and well-being. It is here that humanity will grow, strengthen and improve. Here, humanity will learn to read progress and individual harmony in the works of nature, while humanity's own works are all too often those of barbarism, fanaticism and destruction.'

Louis Pasteur

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