Properties of Aluminium and Terbium
Melting Point
1,356.00 °C
  
33
Boiling Point
2,467.00 °C
  
99+
3,123.00 °C
  
29
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
160.00 MPa
  
99+
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
5,000.00 m/s
  
10
2,620.00 m/s
  
35
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Al
  
Tb
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
577.50 kJ/mol
  
99+
603.40 kJ/mol
  
99+
2nd Energy Level
1,816.70 kJ/mol
  
19
1,174.80 kJ/mol
  
99+
3rd Energy Level
2,744.80 kJ/mol
  
38
2,417.00 kJ/mol
  
99+
Electrochemical Equivalent
0.34 g/amp-hr
  
99+
1.98 g/amp-hr
  
31
Other Chemical Properties
Density
  
  
Density At Room Temperature
2.70 g/cm3
  
99+
8.23 g/cm3
  
99+
Density When Liquid (at m.p.)
2.38 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Al
  
Tb
  
Group Number
Not Available
  
Period Number
3
  
6
  
Atomic Weight
158.93 amu
  
99+
Atomic Volume
10.00 cm3/mol
  
99+
19.20 cm3/mol
  
22
Electron Configuration
[Ne] 3s2 3p1
  
[Xe] 4f9 6s2
  
Valence Electron Potential
80.70 (-eV)
  
17
46.80 (-eV)
  
33
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Aluminium.jpg#100
  
HCP-Crystal-Structure-of-Terbium.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, 2 π/3
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
28.20 nΩ·m
  
99+
Electrical Conductivity
0.38 106/cm Ω
  
4
0.01 106/cm Ω
  
99+
Electron Affinity
42.50 kJ/mol
  
26
50.00 kJ/mol
  
21
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.90 J/(kg K)
  
5
0.18 J/(kg K)
  
33
Thermal Conductivity
237.00 W/m·K
  
4
11.10 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.20 J/mol·K
  
99+
28.91 J/mol·K
  
9
Thermal Expansion
23.10 µm/(m·K)
  
17
10.30 µm/(m·K)
  
38
Standard Molar Entropy
28.30 J/mol.K
  
99+
73.20 J/mol.K
  
10
Enthalpy
  
  
Enthalpy of Vaporization
293.70 kJ/mol
  
31
330.90 kJ/mol
  
26
Enthalpy of Fusion
10.67 kJ/mol
  
35
10.80 kJ/mol
  
34
Enthalpy of Atomization
322.20 kJ/mol
  
31
314.00 kJ/mol
  
33