Properties of Aluminium and Indium
Boiling Point
2,467.00 °C
  
99+
2,000.00 °C
  
99+
Hardness
  
  
Brinell Hardness
160.00 MPa
  
99+
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
5,000.00 m/s
  
10
1,215.00 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
  
In
  
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+
558.30 kJ/mol
  
99+
2nd Energy Level
1,816.70 kJ/mol
  
19
1,820.70 kJ/mol
  
18
3rd Energy Level
2,744.80 kJ/mol
  
38
2,704.00 kJ/mol
  
39
Electrochemical Equivalent
0.34 g/amp-hr
  
99+
1.43 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
2.70 g/cm3
  
99+
7.31 g/cm3
  
99+
Density When Liquid (at m.p.)
2.38 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
Symbol
Al
  
In
  
Period Number
3
  
5
  
Atomic Weight
114.82 amu
  
99+
Atomic Volume
10.00 cm3/mol
  
99+
15.70 cm3/mol
  
33
Electron Configuration
[Ne] 3s2 3p1
  
[Kr] 4d10 5s2 5p1
  
Valence Electron Potential
80.70 (-eV)
  
17
54.00 (-eV)
  
25
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Aluminium.jpg#100
  
TETR-Crystal-Structure-of-Indium.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+
Electrical Conductivity
0.38 106/cm Ω
  
4
0.12 106/cm Ω
  
17
Electron Affinity
42.50 kJ/mol
  
26
28.90 kJ/mol
  
31
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.90 J/(kg K)
  
5
0.23 J/(kg K)
  
27
Thermal Conductivity
237.00 W/m·K
  
4
81.80 W/m·K
  
21
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.20 J/mol·K
  
99+
26.74 J/mol·K
  
25
Thermal Expansion
23.10 µm/(m·K)
  
17
32.10 µm/(m·K)
  
9
Standard Molar Entropy
28.30 J/mol.K
  
99+
57.80 J/mol.K
  
22
Enthalpy
  
  
Enthalpy of Vaporization
293.70 kJ/mol
  
31
226.40 kJ/mol
  
40
Enthalpy of Fusion
10.67 kJ/mol
  
35
3.28 kJ/mol
  
99+
Enthalpy of Atomization
322.20 kJ/mol
  
31
242.70 kJ/mol
  
99+