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Thulium
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Gadolinium
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Thulium
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Gadolinium
Atomic Structure of Thulium and Gadolinium
Thulium
Gadolinium
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Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
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Atomic
Atomic Number
69
64
3
117
👆🏻
Electron Configuration
[Xe] 4f
13
6s
2
[Xe] 4f
7
5d
1
6s
2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
Atom
Number of Protons
69
64
3
117
👆🏻
Number of Neutrons
100
93
4
285
👆🏻
Number of Electrons
69
64
3
117
👆🏻
Radius of an Atom
Atomic Radius
176.00 pm
180.00 pm
0
348
👆🏻
Covalent Radius
160.00 pm
196.00 pm
0
260
👆🏻
Van der Waals Radius
227.00 pm
237.00 pm
0
348
👆🏻
Atomic Weight
168.93 amu
47.87 amu
6.94
294
👆🏻
Atomic Volume
18.10 cm3/mol
19.90 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
49.70 (-eV)
46.10 (-eV)
0
392.42
👆🏻
Lattice Constant
353.75 pm
363.60 pm
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.57
1.59
0.423
1.9
👆🏻
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