Facts About Cerium and Hafnium
Interesting Facts
- Cerium is a rare earth metal but still it is not rare at all.
- It’s non-toxic compound Cerium sulfide has a rich red color and it is used as a pigment.
- Cerium metal is also used in Flat screen TVs, light bulb, floodlights, etc.
  
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
  
Sources
Found in Minerals, Mining, Ores of Minerals
  
By-product Zirconium Refining
  
History
  
  
Who Discovered
Martin Heinrich Klaproth, Jöns Jakob Berzelius, Wilhelm Hisinger
  
Dirk Coster and George de Hevesy
  
Discovery
In 1803
  
In 1922
  
Abundance
  
  
Abundance In Sun
~0.0000004 %
  
23
~0.0000001 %
  
26
Abundance In Earth's Crust