Nb Niobium     Atomic number : 41 
    Relative atomic mass (12C = 12.0000) :  92.90638 
    P H Y S I C A L     D A T A
Group 5 transition metal
 
Density / kg m-3 :  8570 [293 K]; 7830 [liquid at m.p.]
 
Melting point / K :  2741 
 
Boiling point / K :  5015
 
    D I S C O V E R Y
Discovered in 1801 by C. Hatchett at London, England.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 79
 
Earth's crust / p.p.m. : 20
 
Residence time / years : n.a.
 
Oxidation state : V
 
  
 
Seawater / p.p.m. : 9 × 10-7
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 0.005
 
Bone / p.p.m. : < 0.07
 
Liver / p.p.m. : 0.14
 
Muscle / p.p.m. : 0.14
 
  
 
Daily dietary intake : 0.02 - 0.6 mg
 
Total mass of element
in average (70 kg) person :
1.5 mg

 

NetElements II  

A portrait of niobium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.


Text copyright John Emsley 1999.   HTML and page layout copyright Simon Hall 1999.
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NetElements II last modified October 27th, 1999