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Holmium Properties
Holmium


Physical
0
Melting Point
1,461.00 °C 30
Boiling Point
2,600.00 °C 42
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
746.00 MPa 13
Vickers Hardness
481.00 MPa 23
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
2,760.00 m/s 30
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Ho 0
Isotopes
0
Known Isotopes
34 5
Electronegativity
0
Pauling Electronegativity
1.23 37
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.10 30
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.77 17
Ionization Energies
0
1st Energy Level
581.00 kJ/mol 62
2nd Energy Level
1,140.00 kJ/mol 70
3rd Energy Level
2,204.00 kJ/mol 63
Electrochemical Equivalent
2.02 g/amp-hr 29
Electron Work Function
Not Available 0
Other Chemical Properties
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
8.79 g/cm3 46
Density When Liquid (at m.p.)
8.34 g/cm3 26
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 16
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
26.30 GPa 28
Bulk Modulus
40.20 GPa 32
Young's Modulus
64.80 GPa 31
Poisson Ratio
0.23 29
Other Mechanical Properties
Ductile, Malleable, Sectile 0
Periodic Table
0
Symbol
Ho 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
Atomic
0
Atomic Number
67 49
Atomic Weight
164.93 amu 44
Atomic Volume
18.70 cm3/mol 24
Electron Configuration
[Xe] 4f11 6s2 0
Valence Electron Potential
47.90 (-eV) 31
Atom
0
Number of Protons
67 48
Number of Neutrons
98 34
Number of Electrons
67 48
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Holmium.jpg#100 0
Radius of an Atom
0
Atomic Radius
176.00 pm 18
Covalent Radius
192.00 pm 17
Van der Waals Radius
216.00 pm 24
Lattice Constant
357.73 pm 38
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
1.57 17
Adjacent Atomic Numbers
0
Next Element
48 0
Previous Element
78 0
Magnetic
0
Electrical Properties
0
Resistivity
814.00 nΩ·m 4
Electrical Conductivity
0.01 106/cm Ω 52
Electron Affinity
50.00 kJ/mol 21
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
8.80 35
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.16 J/(kg K) 35
Thermal Conductivity
16.20 W/m·K 52
Critical Temperature
Not Available 0
Molar Heat Capacity
27.15 J/mol·K 19
Thermal Expansion
11.20 µm/(m·K) 35
Standard Molar Entropy
75.30 J/mol.K 8
Enthalpy
0
Enthalpy of Vaporization
241.00 kJ/mol 38
Enthalpy of Fusion
11.76 kJ/mol 29
Enthalpy of Atomization
301.00 kJ/mol 36
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