Symbol Er
Atomic Number 68
Atomic Mass 167.26 g.mol -1
Discovered by Nobel Institute for Physics in 1957

Chemical Properties of Erbium

Group Lanthanides Melting point 1522 °C
Period 6 Boiling point 2510 °C
Block f Density (g cm−3) 9.07
Atomic number 68 Relative atomic mass 167.259  
State at 20°C Solid Key isotopes 166Er 
Electron configuration [Xe] 4f126s2  CAS number 7440-52-0
ChemSpider ID 22416 ChemSpider is a free chemical structure database

What is Erbium?

  • Erbium is a chemical radioactive element present as the eleventh element in the lanthanide series of the periodic table. The pure form of the element is a metal.
  • Naturally, occurring Erbium is found in chemical combination with other naturally occurring elements. When it is artificially isolated its appearance is a silvery-white solid metal.

Uses of Erbium

  • It is metal used to color lenses of glasses.
  • They are used as control rods in a nuclear reactor.
  • It has a vital application in metal alloys.
  • Erbium ion’s unique wavelength aids laser surgery.

Properties of Erbium

  • The pure form of Erbium metal is malleable.
  • They are very stable and they do not oxidize quickly when exposed to air when compared to other rare earth metals.
  • It comprises of properties that are similar to other rare earth materials or lanthanides.
  • It is an interesting probe for a large variety of physical effects due to its unique properties.

Certain Facts About Erbium

  • Although Erbium is considered as a rare metal, it is actually not since it is the forty-fifth abundant element found in the earth’s crust.

Practise This Question

We need to store 1l of cold water in warm weather for as long as possible. In which of the following shapes should a flask be built for the task. Assume the thickness and material are same for all the shapes.