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Atomic Structure of Lanthanum and Iridium


Atomic Structure of Iridium and Lanthanum


Atomic Properties

Atomic Number
57   
99+
77   
39

Electron Configuration
[Xe] 5d2 6s2   
[Xe] 4f14 5d7 6s2   

Crystal Structure
Double Hexagonal Close Packed (DHCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100   
FCC-Crystal-Structure-of-Iridium.jpg#100   

Atom
  
  

Number of Protons
57   
99+
74   
99+

Number of Neutrons
82   
99+
110   
27

Number of Electrons
57   
99+
74   
99+

Radius of an Atom
  
  

Atomic Radius
187.00 pm   
8
136.00 pm   
99+

Covalent Radius
207.00 pm   
6
141.00 pm   
99+

Van der Waals Radius
240.00 pm   
13
202.00 pm   
27

Atomic Weight
138.91 amu   
99+
192.22 amu   
34

Atomic Volume
20.73 cm3/mol   
16
9.53 cm3/mol   
99+

Adjacent Atomic Numbers
  
  

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Osmium
  

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Cerium
  
Platinum
  

Valence Electron Potential
40.71 (-eV)   
99+
140.00 (-eV)   
5

Lattice Constant
377.20 pm   
28
383.90 pm   
26

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

Lattice C/A Ratio
1.62   
2
Not Available   

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