Properties of Samarium and Tin
Melting Point
1,072.00 °C
  
99+
Boiling Point
1,900.00 °C
  
99+
2,270.00 °C
  
99+
Hardness
  
  
Mohs Hardness
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
2,130.00 m/s
  
99+
2,730.00 m/s
  
32
Allotropes
No
  
Yes
  
α Allotropes
Not Available
  
Grey Tin (Alpha Tin, Tin Pest)
  
β Allotropes
Not Available
  
White Tin (Beta Tin)
  
γ Allotropes
Not Available
  
Rhombic Tin (Gamma Tin)
  
Chemical Formula
Sm
  
Sn
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
544.50 kJ/mol
  
99+
708.60 kJ/mol
  
33
2nd Energy Level
1,070.00 kJ/mol
  
99+
1,411.80 kJ/mol
  
99+
3rd Energy Level
2,260.00 kJ/mol
  
99+
2,943.00 kJ/mol
  
30
Electrochemical Equivalent
1.87 g/amp-hr
  
34
1.11 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
7.52 g/cm3
  
99+
7.37 g/cm3
  
99+
Density When Liquid (at m.p.)
Vapor Pressure
  
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
NA
  
Symbol
Sm
  
Sn
  
Group Number
Not Available
  
Period Number
6
  
5
  
Atomic Weight
150.36 amu
  
99+
118.71 amu
  
99+
Atomic Volume
19.95 cm3/mol
  
19
16.30 cm3/mol
  
32
Electron Configuration
[Xe] 4f6 6s2
  
[Kr] 4d10 5s2 5p2
  
Valence Electron Potential
44.80 (-eV)
  
37
83.50 (-eV)
  
14
Atom
  
  
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100
  
TETR-Crystal-Structure-of-Tin.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
115.00 nΩ·m
  
28
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.09 106/cm Ω
  
23
Electron Affinity
50.00 kJ/mol
  
21
107.30 kJ/mol
  
8
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.20 J/(kg K)
  
31
0.23 J/(kg K)
  
28
Thermal Conductivity
13.30 W/m·K
  
99+
66.80 W/m·K
  
25
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
29.54 J/mol·K
  
7
27.11 J/mol·K
  
20
Thermal Expansion
12.70 µm/(m·K)
  
30
22.00 µm/(m·K)
  
20
Standard Molar Entropy
69.60 J/mol.K
  
15
51.20 J/mol.K
  
29
Enthalpy
  
  
Enthalpy of Vaporization
166.40 kJ/mol
  
99+
290.40 kJ/mol
  
32
Enthalpy of Fusion
8.62 kJ/mol
  
40
7.03 kJ/mol
  
99+
Enthalpy of Atomization
209.00 kJ/mol
  
99+
301.30 kJ/mol
  
35