Properties of Holmium and Vanadium
Melting Point
1,461.00 °C
  
30
1,890.00 °C
  
13
Boiling Point
2,600.00 °C
  
99+
3,380.00 °C
  
20
Hardness
  
  
Mohs Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
2,760.00 m/s
  
30
4,560.00 m/s
  
17
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Ho
  
V
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol
  
99+
650.90 kJ/mol
  
99+
2nd Energy Level
1,140.00 kJ/mol
  
99+
1,414.00 kJ/mol
  
99+
3rd Energy Level
2,204.00 kJ/mol
  
99+
2,830.00 kJ/mol
  
35
Electrochemical Equivalent
2.02 g/amp-hr
  
29
0.38 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
8.79 g/cm3
  
99+
6.00 g/cm3
  
99+
Density When Liquid (at m.p.)
5.50 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Ho
  
V
  
Group Number
Not Available
  
Period Number
6
  
4
  
Atomic Weight
164.93 amu
  
99+
Atomic Volume
18.70 cm3/mol
  
24
8.78 cm3/mol
  
99+
Electron Configuration
[Xe] 4f11 6s2
  
[Ar] 3d3 4s2
  
Valence Electron Potential
47.90 (-eV)
  
31
120.00 (-eV)
  
6
Atom
  
  
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
197.00 nΩ·m
  
19
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.05 106/cm Ω
  
35
Electron Affinity
50.00 kJ/mol
  
21
50.60 kJ/mol
  
20
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.16 J/(kg K)
  
35
0.49 J/(kg K)
  
10
Thermal Conductivity
16.20 W/m·K
  
99+
30.70 W/m·K
  
39
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
27.15 J/mol·K
  
19
24.89 J/mol·K
  
99+
Thermal Expansion
11.20 µm/(m·K)
  
35
8.40 µm/(m·K)
  
99+
Standard Molar Entropy
75.30 J/mol.K
  
8
28.90 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
241.00 kJ/mol
  
38
458.60 kJ/mol
  
14
Enthalpy of Fusion
11.76 kJ/mol
  
29
17.57 kJ/mol
  
14
Enthalpy of Atomization
301.00 kJ/mol
  
36
514.60 kJ/mol
  
13