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Atomic Structure of Lanthanum and Gadolinium


Atomic Structure of Gadolinium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
64   
99+

Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f7 5d1 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-Gadolinium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
64   
99+

Number of Neutrons
82   
99+
93   
37

Number of Electrons
57   
99+
64   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
180.00 pm   
14

Covalent Radius
207.00 pm   
6
196.00 pm   
14

Van der Waals Radius
240.00 pm   
13
237.00 pm   
15

Atomic Weight
138.91 amu   
99+
47.87 amu   
99+

Atomic Volume
20.73 cm3/mol   
16
19.90 cm3/mol   
20

Adjacent Atomic Numbers
  
  

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Barium
  
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Next Element
Cerium
  
Terbium
  

Valence Electron Potential
40.71 (-eV)   
99+
46.10 (-eV)   
34

Lattice Constant
377.20 pm   
28
363.60 pm   
32

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

Lattice C/A Ratio
1.62   
2
1.59   
9

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