Niobium - Wikipedia
WEBNiobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron.
Niobium (Columbium) Chemical and Physical Properties
WEBJul 3, 2019 · Niobium (Columbium) Physical Data . Density (g/cc): 8.57; Melting Point (K): 2741; Boiling Point (K): 5015; Appearance: shiny white, soft, ductile metal; Atomic Radius (pm): 146; Atomic Volume (cc/mol): 10.8; Covalent Radius (pm): 134; Ionic Radius: 69 (+5e) Specific Heat (@20°C J/g mol): 0.268; Fusion Heat (kJ/mol): 26.8; Evaporation Heat (kJ ...
Niobium | Properties, Uses, & History of the Chemical Element
WEBNiobium, chemical element, refractory metal of Group 5 (Vb) of the periodic table, used in alloys, tools and dies, and superconductive magnets. Niobium is closely associated with tantalum in ores and in properties.
Niobium - Element information, properties and uses | Periodic Table
WEBBoth niobium and tantalum are found together in the mineral columbite, a mixed oxide that also contains iron and manganese, and they have similar chemical and physical properties. In fact Niobium was originally named columbium after Columbia, because of its discovery in a mineral sent from America in 1801.
Facts About Niobium | Live Science
WEBAug 2, 2018 · Many metallurgists and metal societies, however, still refer to niobium as columbium. Who knew? Niobium is named for the Greek goddess of tears, Niobe, who was the daughter of king Tantalus,...
Niobium Facts - Element Nb or Atomic Number 41 - Science …
WEBDec 27, 2023 · Niobium is a transition metal that is known for its strength and unique physical properties. It has the atomic symbol Nb and atomic number 41. However, the element’s original name was columbium with symbol Cb.
Columbium | The Canadian Encyclopedia
WEBFeb 6, 2006 · Columbium (Cb), or niobium, is a grey, ductile, tarnish-resistant and superconductive metal with a melting point of 2468°C. The name niobium (Nb) was officially adopted in 1951 by the International Union of Pure …
Niobium - Wikiwand
WEBNiobium is often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from Greek mythology: Niobe, daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, which makes them difficult to distinguish.
Subtle niobium | Nature Chemistry
WEBJan 23, 2015 · Originally dubbed columbium by discoverer Charles Hatchett in 1801, niobium was exceedingly difficult to separate from its group 5 neighbour tantalum, as they possess very similar chemical...
Niobium, Chemical Element - uses, elements, metal, number, …
WEBSome still call the element columbium, although the official name is now niobium. Niobium is used in many alloys. An alloy is made by melting and mixing two or more metals. The mixture has properties different from those of the individual metals.
Skip to content