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Thulium Properties
Thulium


Physical
0
Melting Point
1,545.00 °C 23
Boiling Point
1,730.00 °C 55
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
471.00 MPa 25
Vickers Hardness
520.00 MPa 21
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Tm 0
Isotopes
0
Known Isotopes
32 7
Electronegativity
0
Pauling Electronegativity
1.25 35
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.11 29
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
2.75 19
Ionization Energies
0
1st Energy Level
596.70 kJ/mol 55
2nd Energy Level
1,160.00 kJ/mol 66
3rd Energy Level
2,285.00 kJ/mol 57
Electrochemical Equivalent
2.10 g/amp-hr 26
Electron Work Function
Not Available 0
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
9.32 g/cm3 40
Density When Liquid (at m.p.)
8.56 g/cm3 24
Vapor Pressure
0
Vapor Pressure at 1000 K
0.06 (Pa) 10
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
30.50 GPa 22
Bulk Modulus
44.50 GPa 26
Young's Modulus
74.00 GPa 27
Poisson Ratio
0.21 31
Other Mechanical Properties
Ductile, Malleable 0
Periodic Table
0
Symbol
Tm 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
Atomic
0
Atomic Number
69 47
Atomic Weight
168.93 amu 42
Atomic Volume
18.10 cm3/mol 28
Electron Configuration
[Xe] 4f13 6s2 0
Valence Electron Potential
49.70 (-eV) 28
Atom
0
Number of Protons
69 46
Number of Neutrons
100 32
Number of Electrons
69 46
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Thulium.jpg#100 0
Radius of an Atom
0
Atomic Radius
176.00 pm 18
Covalent Radius
160.00 pm 30
Van der Waals Radius
Not Available 0
Lattice Constant
353.75 pm 40
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
1.57 17
Adjacent Atomic Numbers
0
Next Element
76 0
Previous Element
48 0
Magnetic
0
Electrical Properties
0
Resistivity
676.00 nΩ·m 5
Electrical Conductivity
0.02 106/cm Ω 49
Electron Affinity
50.00 kJ/mol 21
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
9.32 31
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.16 J/(kg K) 35
Thermal Conductivity
16.90 W/m·K 49
Critical Temperature
Not Available 0
Molar Heat Capacity
27.03 J/mol·K 22
Thermal Expansion
13.30 µm/(m·K) 29
Standard Molar Entropy
74.00 J/mol.K 9
Enthalpy
0
Enthalpy of Vaporization
191.00 kJ/mol 42
Enthalpy of Fusion
16.80 kJ/mol 17
Enthalpy of Atomization
247.00 kJ/mol 41
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