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columbium    
n. 钶[金属元素]

钶[金属元素]

columbium
n 1: a former name for niobium

Columbium \Co*lum"bi*um\, n. [NL., fr. Columbia America.]
(Chem.)
A rare element of the vanadium group, first found in a
variety of the mineral columbite occurring in Connecticut,
probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now
more commonly called {niobium}.
[1913 Webster]


niobium \ni*o"bi*um\, n. [NL., fr. L. & E. {Niobe}.] (Chem.)
The chemical element of atomic number 41. Chemical symbol Nb.
Atomic weight 92.91. Previously called {columbium}. See also
{Columbium}.
[1913 Webster]


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  • Niobium - Wikipedia
    Niobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41 It is a light grey, crystalline transition metal Pure niobium has a Mohs hardness rating similar to pure titanium, [8] and it has similar ductility to iron
  • Properties, Uses, History of the Chemical Element - Britannica
    Niobium was first discovered (1801) in an ore sample from Connecticut by the English chemist Charles Hatchett, who called the element columbium in honour of the country of its origin, Columbia being a synonym for the United States
  • Niobium - Element information, properties and uses | Periodic Table
    Others doubted columbium, especially after the discovery of tantalum which happened the following year These metals occur together in nature, and are difficult to separate In 1844 the German chemist Heinrich Rose proved that columbite contained both elements and he renamed columbium niobium
  • Niobium (Columbium) Chemical and Physical Properties - ThoughtCo
    Get periodic table facts on the chemical and physical properties of the element niobium or columbium
  • Niobium and Tantalum Statistics and Information
    Statistics and information on the worldwide supply of, demand for, and flow of the mineral commodities niobium (columbium) and tantalum
  • Columbium: Properties, Uses, and Future in Technology
    Columbium, a transition metal better known as niobium, holds a unique spot in both scientific and industrial circles Its properties make it a material of choice in various applications, from the aerospace sector to electronics and materials science
  • Niobium, Nb (Formerly Columbium, Cb) - Properties, Applications
    Niobium is a shiny white, ductile and soft metal that shows a light bluish tinge after prolonged exposure to air at room temperatures It was originally named as columbium by Charles Hatchett who discovered it in 1801
  • Niobium Facts – Element Nb or Atomic Number 41
    Hatchett named the new element columbium after the poetic name for America: Columbia After Hatchett’s discovery, the element was known as columbium in the United States However, in 1844, the German chemist Heinrich Rose discovered two new elements in tantalite and named them niobium and pelopium The name “niobium” comes from Greek
  • Niobium (Nb) - Periodic Table
    From Wikipedia, the free encyclopedia Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41 It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite
  • niobium columbium — Wordorigins. org
    Niobium is a chemical element with atomic number 41 and the symbol Nb It had been known previously as columbium, symbol Cb Niobium is a light gray, crystalline transition metal with a hardness similar to titanium and a ductility similar to iron





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