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Gadolinium vs Europium

Gadolinium
Europium
Europium vs Gadolinium


Periodic Table
Symbol
Gd   
Eu   
Group Number
0   
18
Not Available   
Period Number
6   
6   
Block
f block   
f block   
Element Family
Lanthanide   
Lanthanide   
CAS Number
7440542   
33
7440531   
34
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   
Found in Minerals, Mining, Ores of Minerals   
History
  
  
Who Discovered
Jean Charles Galissard de Marignac   
Eugène-Anatole Demarçay   
Discovery
In 1880   
In 1896   
Abundance
  
  
Abundance In Universe
2 * 10-7 %   
22
5 * 10-8 %   
27
Abundance In Sun
~0.0000002 %   
25
~0.00000005 %   
27
Abundance In Meteorites
0.00 %   
34
0.00 %   
99+
Abundance In Earth's Crust
0.00 %   
30
0.00 %   
36
Abundance In Oceans
0.00 %   
38
0.00 %   
99+
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).
  
  • Europium metals main uses is in the printing of euro banknotes. These notes glow red under UV light.
  • It is used in low energy light bulbs.
  
Industrial Uses
Aerospace Industry, Electrical Industry, Electronic Industry   
Chemical Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
Physical Properties
Melting Point
1,311.00 °C   
35
822.00 °C   
99+
Boiling Point
3,233.00 °C   
25
1,597.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
Lustrous   
Hardness
  
  
Vickers Hardness
510.00 MPa   
22
167.00 MPa   
34
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   
Eu   
Isotopes
  
  
Known Isotopes
26   
13
31   
8
Electronegativity
  
  
Pauling Electronegativity
1.20   
39
1.20   
39
Sanderson Electronegativity
Not Available   
1.01   
22
Allred Rochow Electronegativity
1.11   
29
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.80   
15
Not Available   
Ionization Energies
  
  
1st Energy Level
593.40 kJ/mol   
99+
547.10 kJ/mol   
99+
2nd Energy Level
1,170.00 kJ/mol   
99+
1,085.00 kJ/mol   
99+
3rd Energy Level
1,990.00 kJ/mol   
99+
2,404.00 kJ/mol   
99+
4th Energy Level
4,250.00 kJ/mol   
30
4,120.00 kJ/mol   
33
Electrochemical Equivalent
1.96 g/amp-hr   
32
1.89 g/amp-hr   
33
Electron Work Function
3.10 eV   
35
2.50 eV   
99+
Other Chemical Properties
Corrosion, Flammable, Ionization, Radioactive Isotopes   
Ionization, Radioactive Isotopes, Solubility   
Atomic Properties
Atomic Number
64   
99+
63   
99+
Electron Configuration
[Xe] 4f7 5d1 6s2   
[Xe] 4f7 6s2   
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+
63   
99+
Number of Neutrons
93   
37
89   
38
Number of Electrons
64   
99+
63   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
180.00 pm   
14
Covalent Radius
196.00 pm   
14
198.00 pm   
13
Van der Waals Radius
237.00 pm   
15
233.00 pm   
18
Atomic Weight
47.87 amu   
99+
151.96 amu   
99+
Atomic Volume
19.90 cm3/mol   
20
28.90 cm3/mol   
8
Adjacent Atomic Numbers
  
  
Previous Element
Europium
  
Samarium
  
Next Element
Terbium
  
Gadolinium
  
Valence Electron Potential
46.10 (-eV)   
34
45.60 (-eV)   
35
Lattice Constant
363.60 pm   
32
458.10 pm   
17
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+
5.26 g/cm3   
99+
Density When Liquid (at m.p.)
7.40 g/cm3   
31
5.13 g/cm3   
99+
Tensile Strength
Not Available   
120.00 MPa   
15
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
30
19.40 (Pa)   
4
Vapor Pressure at 2000 K
7.39 (Pa)   
9
Not Available   
Elasticity properties
  
  
Shear Modulus
21.80 GPa   
33
7.90 GPa   
99+
Bulk Modulus
37.90 GPa   
34
8.30 GPa   
99+
Young's Modulus
54.80 GPa   
35
18.20 GPa   
99+
Poisson Ratio
0.26   
23
0.15   
34
Other Mechanical Properties
Ductile, Malleable   
Ductile   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
7.90   
40
5.24   
99+
Magnetic Ordering
Ferromagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
1.31 nΩ·m   
99+
0.90 nΩ·m   
99+
Electrical Conductivity
0.01 106/cm Ω   
99+
0.01 106/cm Ω   
99+
Electron Affinity
50.00 kJ/mol   
21
50.00 kJ/mol   
21
Thermal Properties
Specific Heat
0.23 J/(kg K)   
27
0.18 J/(kg K)   
33
Molar Heat Capacity
37.03 J/mol·K   
2
27.66 J/mol·K   
16
Thermal Conductivity
10.60 W/m·K   
99+
13.90 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
9.40 µm/(m·K)   
99+
35.00 µm/(m·K)   
8
Enthalpy
  
  
Enthalpy of Vaporization
359.40 kJ/mol   
21
143.50 kJ/mol   
99+
Enthalpy of Fusion
10.05 kJ/mol   
36
9.21 kJ/mol   
37
Enthalpy of Atomization
352.00 kJ/mol   
27
180.00 kJ/mol   
99+
Standard Molar Entropy
68.10 J/mol.K   
16
77.80 J/mol.K   
4
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