Sm Samarium     Atomic number : 62 
    Relative atomic mass (12C = 12.0000) :  150.36 
    P H Y S I C A L     D A T A
Group 3 lanthanide
 
Density / kg m-3 :  7520 [293 K]
 
Melting point / K :  1350 
 
Boiling point / K :  2064
 
    D I S C O V E R Y
Discovered in 1879 by P.É. Lecoq de Boisbaudran at Paris, France.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 5.2
 
Earth's crust / p.p.m. : 7.9
 
Residence time / years : 200
 
Classification : recycled
 
Oxidation state : III
 
  
 
Seawater / p.p.m. :
    Atlantic surface : 4.0 × 10-7
    Atlantic deep : 6.4 × 10-7
    Pacific surface : 4.0 × 10-7
    Pacific deep : 10 × 10-7
    B I O L O G I C A L     D A T A
Level in humans
 
Blood / mg dm-3 : 0.008
 
Organs: n.a., but very low
 
  
 
Daily dietary intake : n.a.
 
Total mass of element
in average (70 kg) person :
c. 0.05 mg

 

NetElements II  

A portrait of samarium 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