Properties of Holmium and Bismuth
Melting Point
1,461.00 °C
  
30
Boiling Point
2,600.00 °C
  
99+
1,560.00 °C
  
99+
Hardness
  
  
Mohs Hardness
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
2,760.00 m/s
  
30
1,790.00 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
Ho
  
Bi
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol
  
99+
703.00 kJ/mol
  
35
2nd Energy Level
1,140.00 kJ/mol
  
99+
1,610.00 kJ/mol
  
33
3rd Energy Level
2,204.00 kJ/mol
  
99+
2,466.00 kJ/mol
  
99+
Electrochemical Equivalent
2.02 g/amp-hr
  
29
2.60 g/amp-hr
  
19
Electron Work Function
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
8.79 g/cm3
  
99+
Density When Liquid (at m.p.)
10.05 g/cm3
  
18
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
NA
  
Symbol
Ho
  
Bi
  
Group Number
Not Available
  
Period Number
6
  
6
  
Atomic Weight
164.93 amu
  
99+
Atomic Volume
18.70 cm3/mol
  
24
21.30 cm3/mol
  
14
Electron Configuration
[Xe] 4f11 6s2
  
[Xe] 4f14 5d10 6s2 6p3
  
Valence Electron Potential
47.90 (-eV)
  
31
41.90 (-eV)
  
99+
Atom
  
  
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100
  
RHO-Crystal-Structure-of-Bismuth.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, 2 π/3
  
NA
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.01 106/cm Ω
  
99+
Electron Affinity
50.00 kJ/mol
  
21
91.20 kJ/mol
  
11
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.16 J/(kg K)
  
35
0.12 J/(kg K)
  
40
Thermal Conductivity
16.20 W/m·K
  
99+
7.97 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
27.15 J/mol·K
  
19
25.52 J/mol·K
  
37
Thermal Expansion
11.20 µm/(m·K)
  
35
13.40 µm/(m·K)
  
28
Standard Molar Entropy
75.30 J/mol.K
  
8
56.70 J/mol.K
  
24
Enthalpy
  
  
Enthalpy of Vaporization
241.00 kJ/mol
  
38
151.00 kJ/mol
  
99+
Enthalpy of Fusion
11.76 kJ/mol
  
29
10.90 kJ/mol
  
33
Enthalpy of Atomization
301.00 kJ/mol
  
36
207.10 kJ/mol
  
99+