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Properties of Lutetium and Terbium


Properties of Terbium & Lutetium


Physical Properties

Melting Point
1,652.00 °C   
19
1,356.00 °C   
33

Boiling Point
3,402.00 °C   
19
3,123.00 °C   
29

Hardness
  
  

Mohs Hardness
Not Available   
Not Available   

Brinell Hardness
893.00 MPa   
10
677.00 MPa   
17

Vickers Hardness
1,160.00 MPa   
8
863.00 MPa   
13

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
Not Available   
Not Available   

Speed of Sound
Not Available   
2,620.00 m/s   
35

Allotropes
No   
No   

α Allotropes
Not Available   
Not Available   

β Allotropes
Not Available   
Not Available   

γ Allotropes
Not Available   
Not Available   

Chemical Properties

Chemical Formula
Lu   
Tb   

Isotopes
  
  

Known Isotopes
35   
4
26   
13

Electronegativity
  
  

Pauling Electronegativity
1.27   
34
Not Available   

Sanderson Electronegativity
Not Available   
Not Available   

Allred Rochow Electronegativity
1.14   
28
1.10   
30

Mulliken-Jaffe Electronegativity
Not Available   
Not Available   

Allen Electronegativity
Not Available   
Not Available   

Electropositivity
  
  

Pauling Electropositivity
2.73   
20
Not Available   

Ionization Energies
  
  

1st Energy Level
523.50 kJ/mol   
99+
603.40 kJ/mol   
99+

2nd Energy Level
1,340.00 kJ/mol   
99+
1,174.80 kJ/mol   
99+

3rd Energy Level
2,022.30 kJ/mol   
99+
2,417.00 kJ/mol   
99+

Electrochemical Equivalent
2.18 g/amp-hr   
23
1.98 g/amp-hr   
31

Electron Work Function
3.30 eV   
33
3.00 eV   
36

Other Chemical Properties
?
Anti-corrosion metals have the protection on their surfaces which protect them from corroding in corrosive environments.Anti Corrosion, 
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility
  
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility
  

Mechanical Properties

Density
  
  

Density At Room Temperature
9.84 g/cm3   
38
8.23 g/cm3   
99+

Density When Liquid (at m.p.)
9.30 g/cm3   
22
7.65 g/cm3   
30

Vapor Pressure
  
  

Vapor Pressure at 1000 K
0.00 (Pa)   
33
0.00 (Pa)   
29

Vapor Pressure at 2000 K
3.18 (Pa)   
11
12.50 (Pa)   
8

Tensile Strength
Not Available   
60.00 MPa   
17

Viscosity
Not Available   
Not Available   

Elasticity properties
  
  

Shear Modulus
27.20 GPa   
26
22.10 GPa   
32

Bulk Modulus
47.60 GPa   
23
38.70 GPa   
33

Young's Modulus
68.60 GPa   
30
55.70 GPa   
34

Poisson Ratio
0.26   
21
0.26   
21

Other Mechanical Properties
NA   
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable
  

Periodic Table

Symbol
Lu   
Tb   

Group Number
Not Available   
Not Available   

Period Number
6   
6   

Block
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block
  
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block
  

Element Family
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide
  
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide
  

Atomic Properties

Atomic Number
71   
99+
65   
99+

Atomic Weight
174.97 amu   
40
158.93 amu   
99+

Atomic Volume
17.78 cm3/mol   
30
19.20 cm3/mol   
22

Electron Configuration
[Xe] 6s2 4f14 5d1   
[Xe] 4f9 6s2   

Valence Electron Potential
50.90 (-eV)   
26
46.80 (-eV)   
33

Atom
  
  

Number of Protons
71   
99+
65   
99+

Number of Neutrons
104   
30
94   
36

Number of Electrons
71   
99+
65   
99+

Crystal Structure
?
The hexagonal crystal system consists of the 7 point groups such that all their space groups have the hexagonal lattice as underlying lattice. The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has theHexagonal Close Packed (HCP)
  
?
The hexagonal crystal system consists of the 7 point groups such that all their space groups have the hexagonal lattice as underlying lattice. The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has theHexagonal Close Packed (HCP)
  

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
HCP-Crystal-Structure-of-Terbium.jpg#100   

Radius of an Atom
  
  

Atomic Radius
174.00 pm   
20
177.00 pm   
17

Covalent Radius
187.00 pm   
20
194.00 pm   
16

Van der Waals Radius
221.00 pm   
22
221.00 pm   
22

Lattice Constant
350.31 pm   
99+
360.10 pm   
36

Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
1.59   
10
1.58   
13

Adjacent Atomic Numbers
  
  

Next Element
Hafnium
  
Dysprosium
  

Previous Element
Ytterbium
  
Gadolinium
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
582.00 nΩ·m   
9
1.15 nΩ·m   
99+

Electrical Conductivity
0.02 106/cm Ω   
99+
0.01 106/cm Ω   
99+

Electron Affinity
50.00 kJ/mol   
21
50.00 kJ/mol   
21

Electrical Property
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  

Magnetic Characteristics
  
  

Specific Gravity
9.84   
29
8.23   
39

Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
  
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
  

Permeability
Not Available   
Not Available   

Susceptibility
Not Available   
Not Available   

Thermal Properties

Specific Heat
0.15 J/(kg K)   
36
0.18 J/(kg K)   
33

Thermal Conductivity
16.40 W/m·K   
99+
11.10 W/m·K   
99+

Critical Temperature
Not Available   
Not Available   

Molar Heat Capacity
26.86 J/mol·K   
24
28.91 J/mol·K   
9

Thermal Expansion
9.90 µm/(m·K)   
40
10.30 µm/(m·K)   
38

Standard Molar Entropy
51.00 J/mol.K   
30
73.20 J/mol.K   
10

Enthalpy
  
  

Enthalpy of Vaporization
355.90 kJ/mol   
22
330.90 kJ/mol   
26

Enthalpy of Fusion
18.70 kJ/mol   
13
10.80 kJ/mol   
34

Enthalpy of Atomization
398.00 kJ/mol   
20
314.00 kJ/mol   
33

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