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Atomic Structure of Iridium and Lanthanum


Atomic Structure of Lanthanum and Iridium


Atomic Properties

Atomic Number
77   
39
57   
99+

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

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

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

Atom
  
  

Number of Protons
74   
99+
57   
99+

Number of Neutrons
110   
27
82   
99+

Number of Electrons
74   
99+
57   
99+

Radius of an Atom
  
  

Atomic Radius
136.00 pm   
99+
187.00 pm   
8

Covalent Radius
141.00 pm   
99+
207.00 pm   
6

Van der Waals Radius
202.00 pm   
27
240.00 pm   
13

Atomic Weight
192.22 amu   
34
138.91 amu   
99+

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

Adjacent Atomic Numbers
  
  

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Osmium
  
Barium
  

Next Element
Platinum
  
Cerium
  

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

Lattice Constant
383.90 pm   
26
377.20 pm   
28

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

Lattice C/A Ratio
Not Available   
1.62   
2

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