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Properties of Lutetium and Samarium

Lutetium
Samarium
Properties of Samarium & Lutetium


Physical Properties
Melting Point
1,652.00 °C   
19
1,072.00 °C   
99+
Boiling Point
3,402.00 °C   
19
1,900.00 °C   
99+
Hardness
  
  
Mohs Hardness
Not Available   
Not Available   
Brinell Hardness
893.00 MPa   
10
441.00 MPa   
27
Vickers Hardness
1,160.00 MPa   
8
412.00 MPa   
24
Optical Properties
  
  
Refractive Index
Not Available   
Not Available   
Reflectivity
Not Available   
Not Available   
Speed of Sound
Not Available   
2,130.00 m/s   
99+
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   
Sm   
Isotopes
  
  
Known Isotopes
35   
4
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.27   
34
1.17   
40
Sanderson Electronegativity
Not Available   
Not Available   
Allred Rochow Electronegativity
1.14   
28
1.07   
32
Mulliken-Jaffe Electronegativity
Not Available   
Not Available   
Allen Electronegativity
Not Available   
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.73   
20
2.83   
14
Ionization Energies
  
  
1st Energy Level
523.50 kJ/mol   
99+
544.50 kJ/mol   
99+
2nd Energy Level
1,340.00 kJ/mol   
99+
1,070.00 kJ/mol   
99+
3rd Energy Level
2,022.30 kJ/mol   
99+
2,260.00 kJ/mol   
99+
Electrochemical Equivalent
2.18 g/amp-hr   
23
1.87 g/amp-hr   
34
Electron Work Function
3.30 eV   
33
2.70 eV   
99+
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   
Mechanical Properties
Density
  
  
Density At Room Temperature
9.84 g/cm3   
38
7.52 g/cm3   
99+
Density When Liquid (at m.p.)
9.30 g/cm3   
22
7.16 g/cm3   
32
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
33
0.94 (Pa)   
9
Vapor Pressure at 2000 K
3.18 (Pa)   
11
Not Available   
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Elasticity properties
  
  
Shear Modulus
27.20 GPa   
26
19.50 GPa   
34
Bulk Modulus
47.60 GPa   
23
37.80 GPa   
35
Young's Modulus
68.60 GPa   
30
49.70 GPa   
37
Poisson Ratio
0.26   
21
0.27   
19
Other Mechanical Properties
NA   
NA   
Periodic Table
Symbol
Lu   
Sm   
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+
62   
99+
Atomic Weight
174.97 amu   
40
150.36 amu   
99+
Atomic Volume
17.78 cm3/mol   
30
19.95 cm3/mol   
19
Electron Configuration
[Xe] 6s2 4f14 5d1   
[Xe] 4f6 6s2   
Valence Electron Potential
50.90 (-eV)   
26
44.80 (-eV)   
37
Atom
  
  
Number of Protons
71   
99+
62   
99+
Number of Neutrons
104   
30
88   
39
Number of Electrons
71   
99+
62   
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)   
?
Rhombohedral crystal lattice structure comes under trigonal crystal structure. The Rhombohedral crystal structure is a term associated trigonal crystal structure with the rhombohedral lattice.Rhombohedral (RHO)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
RHO-Crystal-Structure-of-Samarium.jpg#100   
Radius of an Atom
  
  
Atomic Radius
174.00 pm   
20
180.00 pm   
14
Covalent Radius
187.00 pm   
20
198.00 pm   
13
Van der Waals Radius
221.00 pm   
22
229.00 pm   
20
Lattice Constant
350.31 pm   
99+
362.10 pm   
33
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.59   
10
Not Available   
Adjacent Atomic Numbers
  
  
Next Element
Hafnium
  
Europium
  
Previous Element
Ytterbium
  
Promethium
  
Magnetic Properties
Electrical Properties
  
  
Resistivity
582.00 nΩ·m   
9
0.94 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
7.52   
99+
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
0.20 J/(kg K)   
31
Thermal Conductivity
16.40 W/m·K   
99+
13.30 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Molar Heat Capacity
26.86 J/mol·K   
24
29.54 J/mol·K   
7
Thermal Expansion
9.90 µm/(m·K)   
40
12.70 µm/(m·K)   
30
Standard Molar Entropy
51.00 J/mol.K   
30
69.60 J/mol.K   
15
Enthalpy
  
  
Enthalpy of Vaporization
355.90 kJ/mol   
22
166.40 kJ/mol   
99+
Enthalpy of Fusion
18.70 kJ/mol   
13
8.62 kJ/mol   
40
Enthalpy of Atomization
398.00 kJ/mol   
20
209.00 kJ/mol   
99+
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