Facts About Thulium and Gadolinium
Interesting Facts
- Thulium metal can resist corrosion due to dry air .
- Only Tm-169 isotope of Thulium metal occur naturally.
  
- Gadolinium is not found free in nature, hence it is not a native metal.
- Gadolinium metal found in minerals like Monazite and Bastnaesite.
  
Sources
Found in Minerals, Mining, Ores of Minerals
  
Found in Minerals, Mining
  
History
  
  
Who Discovered
Per Teodor Cleve
  
Jean Charles Galissard de Marignac
  
Discovery
In 1879
  
In 1880
  
Abundance
  
  
Abundance In Sun
~0.00000002 %
  
28
~0.0000002 %
  
25
Abundance In Earth's Crust