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Terbium Properties
Terbium


Physical
0
Melting Point
1,356.00 °C 33
Boiling Point
3,123.00 °C 29
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
677.00 MPa 17
Vickers Hardness
863.00 MPa 13
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
2,620.00 m/s 35
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Tb 0
Isotopes
0
Known Isotopes
26 13
Electronegativity
0
Pauling Electronegativity
Not Available 0
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
Not Available 0
Ionization Energies
0
1st Energy Level
603.40 kJ/mol 51
2nd Energy Level
1,174.80 kJ/mol 64
3rd Energy Level
2,417.00 kJ/mol 49
Electrochemical Equivalent
1.98 g/amp-hr 31
Electron Work Function
3.00 eV 36
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
8.23 g/cm3 50
Density When Liquid (at m.p.)
7.65 g/cm3 30
Vapor Pressure
0
Vapor Pressure at 1000 K
0.00 (Pa) 29
Vapor Pressure at 2000 K
12.50 (Pa) 8
Tensile Strength
60.00 MPa 17
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
22.10 GPa 32
Bulk Modulus
38.70 GPa 33
Young's Modulus
55.70 GPa 34
Poisson Ratio
0.26 21
Other Mechanical Properties
Ductile, Malleable 0
Periodic Table
0
Symbol
Tb 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
Atomic
0
Atomic Number
65 51
Atomic Weight
158.93 amu 46
Atomic Volume
19.20 cm3/mol 22
Electron Configuration
[Xe] 4f9 6s2 0
Valence Electron Potential
46.80 (-eV) 33
Atom
0
Number of Protons
65 50
Number of Neutrons
94 36
Number of Electrons
65 50
Crystal Structure
Hexagonal Close Packed (HCP) 0
Crystal Lattice
HCP-Crystal-Structure-of-Terbium.jpg#100 0
Radius of an Atom
0
Atomic Radius
177.00 pm 17
Covalent Radius
194.00 pm 16
Van der Waals Radius
221.00 pm 22
Lattice Constant
360.10 pm 36
Lattice Angles
π/2, π/2, 2 π/3 0
Lattice C/A Ratio
1.58 13
Adjacent Atomic Numbers
0
Next Element
78 0
Previous Element
14 0
Magnetic
0
Electrical Properties
0
Resistivity
1.15 nΩ·m 60
Electrical Conductivity
0.01 106/cm Ω 59
Electron Affinity
50.00 kJ/mol 21
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
8.23 39
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.18 J/(kg K) 33
Thermal Conductivity
11.10 W/m·K 62
Critical Temperature
Not Available 0
Molar Heat Capacity
28.91 J/mol·K 9
Thermal Expansion
10.30 µm/(m·K) 38
Standard Molar Entropy
73.20 J/mol.K 10
Enthalpy
0
Enthalpy of Vaporization
330.90 kJ/mol 26
Enthalpy of Fusion
10.80 kJ/mol 34
Enthalpy of Atomization
314.00 kJ/mol 33
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