Properties of Nickel and Iron
Melting Point
1,453.00 °C
  
31
1,535.00 °C
  
25
Boiling Point
2,732.00 °C
  
38
2,750.00 °C
  
37
Hardness
  
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Speed of Sound
4,900.00 m/s
  
12
5,120.00 m/s
  
8
Allotropes
No
  
Yes
  
α Allotropes
Not Available
  
β Allotropes
Not Available
  
γ Allotropes
Not Available
  
Chemical Formula
Ni
  
Fe
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
737.10 kJ/mol
  
25
762.50 kJ/mol
  
17
2nd Energy Level
1,753.00 kJ/mol
  
25
1,561.90 kJ/mol
  
36
3rd Energy Level
3,395.00 kJ/mol
  
17
2,957.00 kJ/mol
  
29
Electrochemical Equivalent
1.10 g/amp-hr
  
99+
0.69 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
8.91 g/cm3
  
99+
7.87 g/cm3
  
99+
Density When Liquid (at m.p.)
Vapor Pressure
  
  
Tensile Strength
11,000.00 MPa
  
1
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Ni
  
Fe
  
Period Number
4
  
4
  
Atomic Volume
6.59 cm3/mol
  
99+
7.10 cm3/mol
  
99+
Electron Configuration
[Ar] 3d8 4s2 Or [Ar] 3d9 4s1
  
[Ar] 3d6 4s2
  
Valence Electron Potential
42.00 (-eV)
  
99+
67.00 (-eV)
  
20
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Nickel.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
  
  
Electrical Conductivity
0.14 106/cm Ω
  
13
0.10 106/cm Ω
  
20
Electron Affinity
112.00 kJ/mol
  
6
15.70 kJ/mol
  
34
Magnetic Characteristics
  
  
Magnetic Ordering
Ferromagnetic
  
Ferromagnetic
  
Permeability
6.3 * 10-3 H/m
  
1
Specific Heat
0.44 J/(kg K)
  
13
0.44 J/(kg K)
  
13
Thermal Conductivity
90.90 W/m·K
  
18
80.40 W/m·K
  
22
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
26.07 J/mol·K
  
31
25.10 J/mol·K
  
99+
Thermal Expansion
13.40 µm/(m·K)
  
28
11.80 µm/(m·K)
  
33
Standard Molar Entropy
29.90 J/mol.K
  
99+
27.30 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
371.80 kJ/mol
  
20
351.00 kJ/mol
  
23
Enthalpy of Fusion
17.57 kJ/mol
  
14
14.90 kJ/mol
  
22
Enthalpy of Atomization
422.60 kJ/mol
  
17
414.20 kJ/mol
  
19