Uranium Samarium Comparison
Periodic Table
Symbol
U
Sm
Group Number
0
18
Not Available
Period Number
7
6
Block
f block
f block
Element Family
Actinide
Lanthanide
CAS Number
7440611
28
7440199
99+
Space Group Name
Cmcm
R_ 3m
Space Group Number
63.00
10
166.00
6
Facts
Interesting Facts
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
- Samarium metals helps stimulating body metabolism.
- Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
Sources
Earth's crust, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Not Available
Lecoq de Boisbaudran
Discovery
In 1789
In 1879
Abundance
Abundance In Universe
2 * 10-8 %
29
5 * 10-7 %
19
Abundance In Sun
~0.0000001 %
26
~0.0000001 %
26
Abundance In Meteorites
0.00 %
99+
0.00 %
37
Abundance In Earth's Crust
0.00 %
36
0.00 %
29
Abundance In Oceans
0.00 %
11
0.00 %
40
Uses
Uses & Benefits
- The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
- Synthetic elements like transuranium are made from Uranium metal.
- Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
- Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
Industrial Uses
Ammunition Industry, Chemical Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
Alloys, In Nuclear Reactors
Biological Properties
Toxicity
Toxic
Slightly Toxic
Present in Human Body
No
Yes
In Blood
Not Available
0.01 Blood/mg dm-3
22
Physical Properties
Melting Point
1,132.00 °C
39
1,072.00 °C
99+
Boiling Point
3,818.00 °C
16
1,900.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery White
Luster
Metallic
Lustrous
Hardness
Mohs Hardness
6.00
6
Not Available
Brinell Hardness
2,350.00 MPa
2
441.00 MPa
27
Vickers Hardness
1,960.00 MPa
2
412.00 MPa
24
Speed of Sound
3,155.00 m/s
25
2,130.00 m/s
99+
Optical Properties
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
U
Sm
Isotopes
Known Isotopes
25
14
30
9
Electronegativity
Pauling Electronegativity
1.38
28
1.17
40
Allred Rochow Electronegativity
1.22
26
1.07
32
Electropositivity
Pauling Electropositivity
2.62
26
2.83
14
Ionization Energies
1st Energy Level
597.60 kJ/mol
99+
544.50 kJ/mol
99+
2nd Energy Level
1,420.00 kJ/mol
99+
1,070.00 kJ/mol
99+
3rd Energy Level
1,900.00 kJ/mol
99+
2,260.00 kJ/mol
99+
4th Energy Level
3,145.00 kJ/mol
99+
3,990.00 kJ/mol
37
Electrochemical Equivalent
1.48 g/amp-hr
99+
1.87 g/amp-hr
34
Electron Work Function
3.63 eV
30
2.70 eV
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes
Atomic Properties
Atomic Number
92
26
62
99+
Electron Configuration
[Rn] 5f3 6d1 7s2
[Xe] 4f6 6s2
Crystal Structure
Orthorhombic (ORTH)
Rhombohedral (RHO)
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100
RHO-Crystal-Structure-of-Samarium.jpg#100
Atom
Number of Protons
92
26
62
99+
Number of Neutrons
146
13
88
39
Number of Electrons
92
26
62
99+
Radius of an Atom
Atomic Radius
156.00 pm
29
180.00 pm
14
Covalent Radius
196.00 pm
14
198.00 pm
13
Van der Waals Radius
186.00 pm
33
229.00 pm
20
Atomic Weight
238.03 amu
21
150.36 amu
99+
Atomic Volume
12.59 cm3/mol
40
19.95 cm3/mol
19
Adjacent Atomic Numbers
Valence Electron Potential
170.00 (-eV)
4
44.80 (-eV)
37
Lattice Constant
295.08 pm
99+
362.10 pm
33
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
19.10 g/cm3
17
7.52 g/cm3
99+
Density When Liquid (at m.p.)
17.30 g/cm3
7
7.16 g/cm3
32
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.94 (Pa)
9
Vapor Pressure at 2000 K
0.01 (Pa)
20
Not Available
Elasticity properties
Shear Modulus
111.00 GPa
10
19.50 GPa
34
Bulk Modulus
100.00 GPa
16
37.80 GPa
35
Young's Modulus
208.00 GPa
10
49.70 GPa
37
Poisson Ratio
0.23
30
0.27
19
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
18.80
10
7.52
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Conductor
Resistivity
0.28 nΩ·m
99+
0.94 nΩ·m
99+
Electrical Conductivity
0.04 106/cm Ω
37
0.01 106/cm Ω
99+
Electron Affinity
Not Available
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.20 J/(kg K)
31
Molar Heat Capacity
27.67 J/mol·K
15
29.54 J/mol·K
7
Thermal Conductivity
27.50 W/m·K
40
13.30 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
13.90 µm/(m·K)
27
12.70 µm/(m·K)
30
Enthalpy
Enthalpy of Vaporization
477.00 kJ/mol
13
166.40 kJ/mol
99+
Enthalpy of Fusion
15.48 kJ/mol
19
8.62 kJ/mol
40
Enthalpy of Atomization
489.50 kJ/mol
14
209.00 kJ/mol
99+
Standard Molar Entropy
50.20 J/mol.K
31
69.60 J/mol.K
15
|
||
|
||
|
