Atomic Structure of Erbium and Thulium
Electron Configuration
[Xe] 4f12 6s2
  
[Xe] 4f13 6s2
  
Crystal Structure
Hexagonal Close Packed (HCP)
  
Hexagonal Close Packed (HCP)
  
Crystal Lattice
HCP-Crystal-Structure-of-Erbium.jpg#100
  
HCP-Crystal-Structure-of-Thulium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Weight
167.26 amu
  
99+
168.93 amu
  
99+
Atomic Volume
18.40 cm3/mol
  
25
18.10 cm3/mol
  
28
Adjacent Atomic Numbers
  
  
Valence Electron Potential
49.00 (-eV)
  
29
49.70 (-eV)
  
28
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, 2 π/3