Fe Iron     Atomic number : 26 
    Relative atomic mass (12C = 12.0000) :  55.845 
    P H Y S I C A L     D A T A
Group 8 transition metal
 
Density / kg m-3 :  7874 [293 K]; 7035 [liquid at m.p.]
 
Melting point / K :  1808 
 
Boiling point / K :  3023
 
    D I S C O V E R Y
Known to ancient civilizations.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 3.16 × 107
 
Earth's crust / p.p.m. : 41 000
 
Residence time / years : 98
 
Classification : recycled
 
Oxidation state : III
 
  
 
Seawater / p.p.m. :
    Atlantic surface : 1 × 10-4
    Atlantic deep : 4 × 10-4
    Pacific surface : 0.1 × 10-4
    Pacific deep : 1 × 10-4
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 447
 
Bone / p.p.m. : 3 - 380
 
Liver / p.p.m. : 250 -1400
 
Muscle / p.p.m. : 180
 
  
 
Daily dietary intake : 6 - 40 mg
 
Total mass of element
in average (70 kg) person :
4.2 g

 

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


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NetElements II last modified October 27th, 1999