Home
 Compare Metals

Samarium vs Cesium

Samarium
Cesium
Cesium vs Samarium


Periodic Table
Symbol
Sm  
Cs  
Group Number
Not Available  
1  
17
Period Number
6  
6  
Block
f block  
s block  
Element Family
Lanthanide  
Alkali  
CAS Number
7440199  
99+
7440462  
40
Space Group Name
R_ 3m  
Im_ 3m  
Space Group Number
166.00  
6
229.00  
1
Facts
Interesting Facts
  • Samarium metals helps stimulating body metabolism.
  • Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
  
Not Available  
Sources
Found in Minerals, Mining, Ores of Minerals  
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Lecoq de Boisbaudran  
Robert Bunsen and Gustav Kirchhoff  
Discovery
In 1879  
In 1860  
Abundance
  
  
Abundance In Universe
5 * 10-7 %  
19
8 * 10-8 %  
24
Abundance In Sun
~0.0000001 %  
26
~0.0000008 %  
20
Abundance In Meteorites
0.00 %  
37
0.00 %  
38
Abundance In Earth's Crust
0.00 %  
29
0.00 %  
35
Abundance In Oceans
0.00 %  
40
0.00 %  
17
Abundance In Humans
Not Available  
0.00 %  
17
Uses
Uses & Benefits
  • 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.
  
  • The most common use of cesium metal is as a drilling fluid. It is also used in optical glass manufacturing.
  • In vacuum tubes and radiation monitor equipment this metal is used as a catalyst promoter.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
NA  
NA  
Other Uses
Alloys, In Nuclear Reactors  
Alloys  
Biological Properties
  
  
Toxicity
Slightly Toxic  
Mildly Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.01 Blood/mg dm-3  
22
0.00 Blood/mg dm-3  
28
In Bone
Not Available  
0.05 p.p.m.  
26
Physical Properties
Melting Point
1,072.00 °C  
99+
28.50 °C  
99+
Boiling Point
1,900.00 °C  
99+
678.40 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Gold  
Luster
Lustrous  
NA  
Hardness
  
  
Mohs Hardness
Not Available  
0.20  
25
Brinell Hardness
441.00 MPa  
27
0.14 MPa  
99+
Vickers Hardness
412.00 MPa  
24
Not Available  
Speed of Sound
2,130.00 m/s  
99+
Not Available  
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
Sm  
Cs  
Isotopes
  
  
Known Isotopes
30  
9
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.17  
40
0.79  
99+
Sanderson Electronegativity
Not Available  
0.22  
33
Allred Rochow Electronegativity
1.07  
32
0.86  
99+
Mulliken-Jaffe Electronegativity
Not Available  
0.62  
26
Allen Electronegativity
Not Available  
0.66  
99+
Electropositivity
  
  
Pauling Electropositivity
2.83  
14
3.21  
2
Ionization Energies
  
  
1st Energy Level
544.50 kJ/mol  
99+
375.70 kJ/mol  
99+
2nd Energy Level
1,070.00 kJ/mol  
99+
2,234.30 kJ/mol  
8
3rd Energy Level
2,260.00 kJ/mol  
99+
3,400.00 kJ/mol  
16
4th Energy Level
3,990.00 kJ/mol  
37
Not Available  
Electrochemical Equivalent
1.87 g/amp-hr  
34
4.96 g/amp-hr  
3
Electron Work Function
2.70 eV  
99+
2.14 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes  
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
62  
99+
55  
99+
Electron Configuration
[Xe] 4f6 6s2  
[Xe] 6s1  
Crystal Structure
Rhombohedral (RHO)  
Body Centered Cubic (BCC)  
Crystal Lattice
RHO-Crystal-Structure-of-Samarium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
62  
99+
55  
99+
Number of Neutrons
88  
39
78  
99+
Number of Electrons
62  
99+
55  
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
14
265.00 pm  
1
Covalent Radius
198.00 pm  
13
244.00 pm  
2
Van der Waals Radius
229.00 pm  
20
343.00 pm  
2
Atomic Weight
150.36 amu  
99+
132.91 amu  
99+
Atomic Volume
19.95 cm3/mol  
19
71.07 cm3/mol  
1
Adjacent Atomic Numbers
  
  
Previous Element
Promethium
  
Tin
  
Next Element
Europium
  
Barium
  
Valence Electron Potential
44.80 (-eV)  
37
8.62 (-eV)  
99+
Lattice Constant
362.10 pm  
33
614.10 pm  
5
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
7.52 g/cm3  
99+
1.93 g/cm3  
99+
Density When Liquid (at m.p.)
7.16 g/cm3  
32
1.84 g/cm3  
99+
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.94 (Pa)  
9
Not Available  
Elasticity properties
  
  
Shear Modulus
19.50 GPa  
34
Not Available  
Bulk Modulus
37.80 GPa  
35
1.60 GPa  
99+
Young's Modulus
49.70 GPa  
37
1.70 GPa  
99+
Poisson Ratio
0.27  
19
Not Available  
Other Mechanical Properties
NA  
Ductile  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.52  
99+
1.87  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Semiconductor  
Resistivity
0.94 nΩ·m  
99+
205.00 nΩ·m  
17
Electrical Conductivity
0.01 106/cm Ω  
99+
0.05 106/cm Ω  
35
Electron Affinity
50.00 kJ/mol  
21
45.50 kJ/mol  
25
Thermal Properties
Specific Heat
0.20 J/(kg K)  
31
0.24 J/(kg K)  
23
Molar Heat Capacity
29.54 J/mol·K  
7
32.21 J/mol·K  
4
Thermal Conductivity
13.30 W/m·K  
99+
35.90 W/m·K  
36
Critical Temperature
Not Available  
1,938.00 K  
5
Thermal Expansion
12.70 µm/(m·K)  
30
97.00 µm/(m·K)  
1
Enthalpy
  
  
Enthalpy of Vaporization
166.40 kJ/mol  
99+
65.90 kJ/mol  
99+
Enthalpy of Fusion
8.62 kJ/mol  
40
2.10 kJ/mol  
99+
Enthalpy of Atomization
209.00 kJ/mol  
99+
78.20 kJ/mol  
99+
Standard Molar Entropy
69.60 J/mol.K  
15
85.20 J/mol.K  
3
Periodic Table >>
<< All

Compare Lanthanide Series

Lanthanide Metals

Lanthanide Metals

» More Lanthanide Metals

Compare Lanthanide Series

» More Compare Lanthanide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!