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Atomic Structure of Erbium and Thulium


Atomic Structure of Thulium and Erbium


Atomic Properties

Atomic Number
68   
99+
69   
99+

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
  
  

Number of Protons
68   
99+
69   
99+

Number of Neutrons
99   
33
100   
32

Number of Electrons
68   
99+
69   
99+

Radius of an Atom
  
  

Atomic Radius
176.00 pm   
18
176.00 pm   
18

Covalent Radius
189.00 pm   
19
160.00 pm   
30

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
  
  

Previous Element
Holmium
  
Erbium
  

Next Element
Thulium
  
Ytterbium
  

Valence Electron Potential
49.00 (-eV)   
29
49.70 (-eV)   
28

Lattice Constant
355.88 pm   
39
353.75 pm   
40

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
1.57   
17
1.57   
17

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