Properties of Aluminium and Barium
Boiling Point
2,467.00 °C
  
99+
1,140.00 °C
  
99+
Hardness
  
  
Brinell Hardness
160.00 MPa
  
99+
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
5,000.00 m/s
  
10
1,620.00 m/s
  
99+
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Al
  
Ba
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
577.50 kJ/mol
  
99+
502.90 kJ/mol
  
99+
2nd Energy Level
1,816.70 kJ/mol
  
19
965.20 kJ/mol
  
99+
3rd Energy Level
2,744.80 kJ/mol
  
38
3,600.00 kJ/mol
  
14
Electrochemical Equivalent
0.34 g/amp-hr
  
99+
2.56 g/amp-hr
  
20
Other Chemical Properties
Density
  
  
Density At Room Temperature
2.70 g/cm3
  
99+
3.51 g/cm3
  
99+
Density When Liquid (at m.p.)
2.38 g/cm3
  
99+
3.34 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
NA
  
Symbol
Al
  
Ba
  
Period Number
3
  
6
  
Atomic Weight
137.33 amu
  
99+
Atomic Volume
10.00 cm3/mol
  
99+
39.24 cm3/mol
  
5
Electron Configuration
[Ne] 3s2 3p1
  
[Xe] 6s2
  
Valence Electron Potential
80.70 (-eV)
  
17
21.30 (-eV)
  
99+
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Aluminium.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
28.20 nΩ·m
  
99+
332.00 nΩ·m
  
13
Electrical Conductivity
0.38 106/cm Ω
  
4
0.03 106/cm Ω
  
40
Electron Affinity
42.50 kJ/mol
  
26
13.95 kJ/mol
  
36
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.90 J/(kg K)
  
5
0.20 J/(kg K)
  
30
Thermal Conductivity
237.00 W/m·K
  
4
18.40 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.20 J/mol·K
  
99+
28.07 J/mol·K
  
12
Thermal Expansion
23.10 µm/(m·K)
  
17
20.60 µm/(m·K)
  
22
Standard Molar Entropy
28.30 J/mol.K
  
99+
62.50 J/mol.K
  
20
Enthalpy
  
  
Enthalpy of Vaporization
293.70 kJ/mol
  
31
140.00 kJ/mol
  
99+
Enthalpy of Fusion
10.67 kJ/mol
  
35
7.66 kJ/mol
  
99+
Enthalpy of Atomization
322.20 kJ/mol
  
31
175.70 kJ/mol
  
99+