Gadolinium Cesium Comparison
Periodic Table
Symbol
Gd
Cs
Group Number
0
18
1
17
Period Number
6
6
Block
f block
s block
Element Family
Lanthanide
Alkali
CAS Number
7440542
33
7440462
40
Space Group Name
P63/mmc
Im_ 3m
Space Group Number
194.00
5
229.00
1
Facts
Interesting Facts
- Gadolinium is not found free in nature, hence it is not a native metal.
- Gadolinium metal found in minerals like Monazite and Bastnaesite.
Not Available
Sources
Found in Minerals, Mining
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Jean Charles Galissard de Marignac
Robert Bunsen and Gustav Kirchhoff
Discovery
In 1880
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 %
34
0.00 %
38
Abundance In Earth's Crust
0.00 %
30
0.00 %
35
Abundance In Oceans
0.00 %
38
0.00 %
17
Abundance In Humans
Not Available
0.00 %
17
Uses
Uses & Benefits
- Its alloys are also used in making Magnets, electronic components and Data storage devices.
- Compound of Gadolinium metal are used in magnetic resonance imaging (MRI).
- 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, Electrical Industry, Electronic Industry
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Non 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
1,311.00 °C
35
28.50 °C
99+
Boiling Point
3,233.00 °C
25
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
Not Available
0.14 MPa
99+
Vickers Hardness
510.00 MPa
22
Not Available
Speed of Sound
2,680.00 m/s
34
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
Gd
Cs
Isotopes
Known Isotopes
26
13
36
3
Electronegativity
Pauling Electronegativity
1.20
39
0.79
99+
Sanderson Electronegativity
Not Available
0.22
33
Allred Rochow Electronegativity
1.11
29
0.86
99+
Mulliken-Jaffe Electronegativity
Not Available
0.62
26
Allen Electronegativity
Not Available
0.66
99+
Electropositivity
Pauling Electropositivity
2.80
15
3.21
2
Ionization Energies
1st Energy Level
593.40 kJ/mol
99+
375.70 kJ/mol
99+
2nd Energy Level
1,170.00 kJ/mol
99+
2,234.30 kJ/mol
8
3rd Energy Level
1,990.00 kJ/mol
99+
3,400.00 kJ/mol
16
4th Energy Level
4,250.00 kJ/mol
30
Not Available
Electrochemical Equivalent
1.96 g/amp-hr
32
4.96 g/amp-hr
3
Electron Work Function
3.10 eV
35
2.14 eV
99+
Other Chemical Properties
Corrosion, Flammable, Ionization, Radioactive Isotopes
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
64
99+
55
99+
Electron Configuration
[Xe] 4f7 5d1 6s2
[Xe] 6s1
Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
Crystal Lattice
HCP-Crystal-Structure-of-Gadolinium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
64
99+
55
99+
Number of Neutrons
93
37
78
99+
Number of Electrons
64
99+
55
99+
Radius of an Atom
Atomic Radius
180.00 pm
14
265.00 pm
1
Covalent Radius
196.00 pm
14
244.00 pm
2
Van der Waals Radius
237.00 pm
15
343.00 pm
2
Atomic Weight
47.87 amu
99+
132.91 amu
99+
Atomic Volume
19.90 cm3/mol
20
71.07 cm3/mol
1
Adjacent Atomic Numbers
Valence Electron Potential
46.10 (-eV)
34
8.62 (-eV)
99+
Lattice Constant
363.60 pm
32
614.10 pm
5
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.59
9
Not Available
Mechanical Properties
Density
Density At Room Temperature
7.90 g/cm3
99+
1.93 g/cm3
99+
Density When Liquid (at m.p.)
7.40 g/cm3
31
1.84 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
30
Not Available
Vapor Pressure at 2000 K
7.39 (Pa)
9
Not Available
Elasticity properties
Shear Modulus
21.80 GPa
33
Not Available
Bulk Modulus
37.90 GPa
34
1.60 GPa
99+
Young's Modulus
54.80 GPa
35
1.70 GPa
99+
Poisson Ratio
0.26
23
Not Available
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
7.90
40
1.87
99+
Magnetic Ordering
Ferromagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Semiconductor
Resistivity
1.31 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
0.23 J/(kg K)
27
0.24 J/(kg K)
23
Molar Heat Capacity
37.03 J/mol·K
2
32.21 J/mol·K
4
Thermal Conductivity
10.60 W/m·K
99+
35.90 W/m·K
36
Critical Temperature
Not Available
1,938.00 K
5
Thermal Expansion
9.40 µm/(m·K)
99+
97.00 µm/(m·K)
1
Enthalpy
Enthalpy of Vaporization
359.40 kJ/mol
21
65.90 kJ/mol
99+
Enthalpy of Fusion
10.05 kJ/mol
36
2.10 kJ/mol
99+
Enthalpy of Atomization
352.00 kJ/mol
27
78.20 kJ/mol
99+
Standard Molar Entropy
68.10 J/mol.K
16
85.20 J/mol.K
3
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