Tm Thulium     Atomic number : 69 
    Relative atomic mass (12C = 12.0000) :  168.93421 
    P H Y S I C A L     D A T A
Group 3 lanthanide
 
Density / kg m-3 :  9321 [293 K]
 
Melting point / K :  1818 
 
Boiling point / K :  2220
 
    D I S C O V E R Y
Discovered in 1879 by P.T. Cleve at Uppsala, Sweden.
 
    G E O L O G I C A L     D A T A
Abundances
 
Sun (relative to H = 1 × 1012) : 1.8
 
Earth's crust / p.p.m. : 0.48
 
Residence time / years : n.a.
 
Classification : recycled
 
Oxidation state : III
 
  
 
Seawater / p.p.m. :
    Atlantic surface : 1.3 × 10-7
    Atlantic deep : 1.6 × 10-7
    Pacific surface : 0.7 × 10-7
    Pacific deep : 3.3 × 10-7
    B I O L O G I C A L     D A T A
Level in humans
 
Organs: n.a., but low
 
  
 
Daily dietary intake : n.a.
 
Total mass of element
in average (70 kg) person :
n.a.

 

NetElements II  

A portrait of thulium 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