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Atomic Structure of Lanthanum and Erbium


Atomic Structure of Erbium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
68   
99+

Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f12 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
HCP-Crystal-Structure-of-Erbium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
68   
99+

Number of Neutrons
82   
99+
99   
33

Number of Electrons
57   
99+
68   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
176.00 pm   
18

Covalent Radius
207.00 pm   
6
189.00 pm   
19

Van der Waals Radius
240.00 pm   
13
Not Available   

Atomic Weight
138.91 amu   
99+
167.26 amu   
99+

Atomic Volume
20.73 cm3/mol   
16
18.40 cm3/mol   
25

Adjacent Atomic Numbers
  
  

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Holmium
  

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Cerium
  
Thulium
  

Valence Electron Potential
40.71 (-eV)   
99+
49.00 (-eV)   
29

Lattice Constant
377.20 pm   
28
355.88 pm   
39

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

Lattice C/A Ratio
1.62   
2
1.57   
17

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