Properties of Gold and Osmium
Melting Point
1,064.43 °C
  
99+
Boiling Point
2,807.00 °C
  
36
Hardness
  
  
Brinell Hardness
194.00 MPa
  
99+
3,490.00 MPa
  
1
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
2,030.00 m/s
  
99+
4,940.00 m/s
  
11
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Au
  
Os
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
890.10 kJ/mol
  
8
840.00 kJ/mol
  
12
2nd Energy Level
1,980.00 kJ/mol
  
12
1,309.80 kJ/mol
  
99+
3rd Energy Level
Not Available
  
1,600.00 kJ/mol
  
99+
Electrochemical Equivalent
2.45 g/amp-hr
  
21
1.77 g/amp-hr
  
38
Other Chemical Properties
Density
  
  
Density At Room Temperature
19.30 g/cm3
  
15
Density When Liquid (at m.p.)
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Tensile Strength
1,000.00 MPa
  
4
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Young's Modulus
Not Available
  
Other Mechanical Properties
Symbol
Au
  
Os
  
Period Number
6
  
6
  
Atomic Volume
10.20 cm3/mol
  
99+
8.49 cm3/mol
  
99+
Electron Configuration
[Xe] 4f14 5d10 6s1
  
[Xe] 4f14 5d6 6s2
  
Valence Electron Potential
43.40 (-eV)
  
99+
91.40 (-eV)
  
12
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Gold.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Radius of an Atom
  
  
Covalent Radius
Not Available
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, 2 π/3
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Electrical Conductivity
0.45 106/cm Ω
  
3
0.11 106/cm Ω
  
18
Electron Affinity
222.80 kJ/mol
  
1
106.10 kJ/mol
  
9
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
0.13 J/(kg K)
  
39
Thermal Conductivity
318.00 W/m·K
  
3
87.60 W/m·K
  
19
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
25.42 J/mol·K
  
40
24.70 J/mol·K
  
99+
Thermal Expansion
14.20 µm/(m·K)
  
26
5.10 µm/(m·K)
  
99+
Standard Molar Entropy
47.40 J/mol.K
  
32
32.60 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
324.40 kJ/mol
  
27
627.60 kJ/mol
  
7
Enthalpy of Fusion
12.55 kJ/mol
  
27
29.30 kJ/mol
  
4
Enthalpy of Atomization
364.00 kJ/mol
  
25
669.00 kJ/mol
  
6