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Dysprosium vs Cesium

Dysprosium
Cesium
Cesium vs Dysprosium


Periodic Table
Symbol
Dy   
Cs   
Group Number
Not Available   
1   
17
Period Number
6   
6   
Block
f block   
s block   
Element Family
Lanthanide   
Alkali   
CAS Number
7429916   
99+
7440462   
40
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • Dysprosium acts stable in air at room temperature.
  • Dysprosium behaves very much like paramagnetic metal.
  
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 1886   
In 1860   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
8 * 10-8 %   
24
Abundance In Sun
~0.0000002 %   
25
~0.0000008 %   
20
Abundance In Meteorites
0.00 %   
33
0.00 %   
38
Abundance In Earth's Crust
0.00 %   
28
0.00 %   
35
Abundance In Oceans
0.00 %   
35
0.00 %   
17
Abundance In Humans
Not Available   
0.00 %   
17
Uses
Uses & Benefits
  • Dysprosium metal is highly reactive due to which it pure form is not as usual as its alloy.
  • Thi metals alloy is used in magnate as it is resistance to high temperature.
  
  • 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
NA   
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research   
Alloys   
Biological Properties
  
  
Toxicity
Mildly Toxic   
Mildly Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.00 Blood/mg dm-3   
28
In Bone
Not Available   
0.05 p.p.m.   
26
Physical Properties
Melting Point
1,407.00 °C   
32
28.50 °C   
99+
Boiling Point
2,562.00 °C   
99+
678.40 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Gold   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
0.20   
25
Brinell Hardness
500.00 MPa   
23
0.14 MPa   
99+
Vickers Hardness
540.00 MPa   
20
Not Available   
Speed of Sound
2,710.00 m/s   
33
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
Dy   
Cs   
Isotopes
  
  
Known Isotopes
29   
10
36   
3
Electronegativity
  
  
Pauling Electronegativity
1.22   
38
0.79   
99+
Sanderson Electronegativity
Not Available   
0.22   
33
Allred Rochow Electronegativity
1.10   
30
0.86   
99+
Mulliken-Jaffe Electronegativity
Not Available   
0.62   
26
Allen Electronegativity
Not Available   
0.66   
99+
Electropositivity
  
  
Pauling Electropositivity
2.78   
16
3.21   
2
Ionization Energies
  
  
1st Energy Level
573.00 kJ/mol   
99+
375.70 kJ/mol   
99+
2nd Energy Level
1,130.00 kJ/mol   
99+
2,234.30 kJ/mol   
8
3rd Energy Level
2,200.00 kJ/mol   
99+
3,400.00 kJ/mol   
16
4th Energy Level
3,990.00 kJ/mol   
37
Not Available   
Electrochemical Equivalent
2.02 g/amp-hr   
29
4.96 g/amp-hr   
3
Electron Work Function
Not Available   
2.14 eV   
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
66   
99+
55   
99+
Electron Configuration
[Xe] 4f9 6s2   
[Xe] 6s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Dysprosium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
66   
99+
55   
99+
Number of Neutrons
96   
35
78   
99+
Number of Electrons
66   
99+
55   
99+
Radius of an Atom
  
  
Atomic Radius
178.00 pm   
16
265.00 pm   
1
Covalent Radius
192.00 pm   
17
244.00 pm   
2
Van der Waals Radius
229.00 pm   
20
343.00 pm   
2
Atomic Weight
162.50 amu   
99+
132.91 amu   
99+
Atomic Volume
19.00 cm3/mol   
23
71.07 cm3/mol   
1
Adjacent Atomic Numbers
  
  
Previous Element
Terbium
  
Tin
  
Next Element
Holmium
  
Barium
  
Valence Electron Potential
47.40 (-eV)   
32
8.62 (-eV)   
99+
Lattice Constant
359.30 pm   
37
614.10 pm   
5
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.57   
15
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
8.54 g/cm3   
99+
1.93 g/cm3   
99+
Density When Liquid (at m.p.)
8.37 g/cm3   
25
1.84 g/cm3   
99+
Tensile Strength
120.00 MPa   
15
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Elasticity properties
  
  
Shear Modulus
24.70 GPa   
31
Not Available   
Bulk Modulus
40.50 GPa   
31
1.60 GPa   
99+
Young's Modulus
61.40 GPa   
33
1.70 GPa   
99+
Poisson Ratio
0.25   
25
Not Available   
Other Mechanical Properties
Sectile   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
8.55   
38
1.87   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Semiconductor   
Resistivity
926.00 nΩ·m   
2
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
0.17 J/(kg K)   
34
0.24 J/(kg K)   
23
Molar Heat Capacity
27.70 J/mol·K   
14
32.21 J/mol·K   
4
Thermal Conductivity
10.70 W/m·K   
99+
35.90 W/m·K   
36
Critical Temperature
Not Available   
1,938.00 K   
5
Thermal Expansion
9.90 µm/(m·K)   
40
97.00 µm/(m·K)   
1
Enthalpy
  
  
Enthalpy of Vaporization
230.00 kJ/mol   
39
65.90 kJ/mol   
99+
Enthalpy of Fusion
11.05 kJ/mol   
32
2.10 kJ/mol   
99+
Enthalpy of Atomization
301.00 kJ/mol   
36
78.20 kJ/mol   
99+
Standard Molar Entropy
75.60 J/mol.K   
7
85.20 J/mol.K   
3
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