niobium


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ni·o·bi·um

 (nī-ō′bē-əm)
n. Symbol Nb
A silvery, soft, rare, ductile metallic element that occurs chiefly in columbite-tantalite and is used in steel alloys, arc welding, and superconductive materials. Atomic number 41; atomic weight 92.906; melting point 2,477°C; boiling point 4,744°C; specific gravity 8.57; valence 2, 3, 5. See Periodic Table.

[After Niobe (so called because it is extracted from tantalite).]

niobium

(naɪˈəʊbɪəm)
n
(Elements & Compounds) a ductile white superconductive metallic element that occurs principally in columbite and tantalite: used in steel alloys. Symbol: Nb; atomic no: 41; atomic wt: 92.90638; valency: 2, 3, or 5; relative density: 8.57; melting pt: 2469±10°C; boiling pt: 4744°C. Former name: columbium
[C19: from New Latin, from Niobe (daughter of Tantalus), so named because it occurred in tantalite]

ni•o•bi•um

(naɪˈoʊ bi əm)

n.
a steel-gray metallic element resembling tantalum in its chemical properties; becomes a superconductor below 9 K; used chiefly in alloy steels. Symbol: Nb; at. no.: 41; at. wt.: 92.906; sp. gr.: 8.4 at 20°C.
[1835–45; < New Latin; see Niobe, -ium2]

ni·o·bi·um

(nī-ō′bē-əm)
Symbol Nb A soft, silvery, easily shaped metallic element that usually occurs in nature together with the element tantalum. It is used to build nuclear reactors, to make steel alloys, and to allow magnets to conduct electricity with almost no resistance. Atomic number 41. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.niobium - a soft grey ductile metallic element used in alloysniobium - a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
columbium - a former name for niobium
columbite, niobite - a black mineral that is an ore of niobium and tantalum
Translations
ниобий
niob
niobium
nioobium
niobiniobium
niobij
nióbium
ニオブ
niobis
niob
niobiu
niobij
niob
niyobyum
niobi

niobium

[nɑɪˈəʊbɪəm] Nniobio m

niobium

n (Chem) → Niob nt
References in periodicals archive ?
The contract is for provision of high-purity niobium (RRR> 260) required for the manufacture of two (2) cavities cupraconductrices prototype.
Niobium (Nb), which becomes superconductive at the highest temperature (9.
In this new work, he and his colleagues have shown that desirable characteristics for such devices, such as high power density, are not unique to carbon-based nanoparticles, and that niobium nanowire yarn is a promising an alternative.
com/prnh/20130307/600769 The Global and Chinese Niobium Carbide Industry Report 2014 is a professional and in-depth study on the current state of the global niobium carbide industry with a focus on the Chinese situation.
One such substance is the material used the new magnet HQ02a 6 a compound called niobium tin.
In Estonia plasmochemical production of niobium and tantalum is using an environmentally friendly technology.
Keywords Chemical vapor deposition, Thermodynamics, Solid-state reactions, Niobium, Silicon carbide
As a result of the reduction reaction (2) two products are formed: alloy of niobium with residual aluminium and slag (calcium--aluminium oxides), having usually a quite clear separation or interfacial area (Fig.
Both in arc and plasma melting (Figure 3), as partial pressure of nitrogen in gas phase grows, its equilibrium (threshold) concentration in the metal and rate of nitrogen absorption by niobium increases.
assemble 19 papers given at the ASTM F04 symposium in November of 2004 held in Washington DC, which centered on alloys made up of titanium, niobium, zirconium, and tantalum, their processing techniques for medical applications, properties important for their use in biomedical applications, and evaluation of their biological and clinical performance.
McKinnon also holds claims for a number of phosphate, gold, niobium and coal deposits in Ontario's remote (North) and Canada's Arctic islands.
Niobium has the highest critical temperature of all super-conducting metals and Cluff Mining is to buy a 49% stake in Niobium Resources, which has a 70% interest in a Gabonese registered company holding mineral tights to the Mabounie niobium deposit in Gabon.