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Europium vs Neodymium

Europium
Neodymium
Neodymium vs Europium


Periodic Table
Symbol
Eu   
Nd   
Group Number
Not Available   
1   
17
Period Number
6   
6   
Block
f block   
f block   
Element Family
Lanthanide   
Lanthanide   
CAS Number
7440531   
34
7440008   
99+
Space Group Name
Im_ 3m   
P63/mmc   
Space Group Number
229.00   
1
194.00   
5
Facts
Interesting Facts
Not Available   
  • Neodymium is not found free in nature, hence it is not a native metal.
  • Neodymium metal found in minerals like Monazite and Bastnaesite.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
Found in Minerals, Mining   
History
  
  
Who Discovered
Eugène-Anatole Demarçay   
Carl Auer von Welsbach   
Discovery
In 1896   
In 1885   
Abundance
  
  
Abundance In Universe
5 * 10-8 %   
27
1 * 10-6 %   
16
Abundance In Sun
~0.00000005 %   
27
~0.0000003 %   
24
Abundance In Meteorites
0.00 %   
99+
0.00 %   
30
Abundance In Earth's Crust
0.00 %   
36
0.00 %   
20
Abundance In Oceans
0.00 %   
99+
0.00 %   
30
Uses
Uses & Benefits
  • 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.
  
  • Neodymium-Iron-boron alloy is used to make permanent magnets.
  • It is used in microphones, Mp3 player, loudspeakers, mobile phones, etc.
  
Industrial Uses
Chemical Industry   
Aerospace Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
NA   
Other Uses
Alloys   
Alloys   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
Yes   
No   
Physical Properties
Melting Point
822.00 °C   
99+
1,010.00 °C   
99+
Boiling Point
1,597.00 °C   
99+
3,127.00 °C   
28
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Lustrous   
Metallic   
Hardness
  
  
Brinell Hardness
Not Available   
265.00 MPa   
35
Vickers Hardness
167.00 MPa   
34
345.00 MPa   
27
Speed of Sound
Not Available   
2,330.00 m/s   
38
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
Eu   
Nd   
Isotopes
  
  
Known Isotopes
31   
8
30   
9
Electronegativity
  
  
Pauling Electronegativity
1.20   
39
1.14   
99+
Sanderson Electronegativity
1.01   
22
Not Available   
Allred Rochow Electronegativity
Not Available   
1.07   
32
Electropositivity
  
  
Pauling Electropositivity
Not Available   
2.86   
13
Ionization Energies
  
  
1st Energy Level
547.10 kJ/mol   
99+
533.10 kJ/mol   
99+
2nd Energy Level
1,085.00 kJ/mol   
99+
1,040.00 kJ/mol   
99+
3rd Energy Level
2,404.00 kJ/mol   
99+
2,130.00 kJ/mol   
99+
4th Energy Level
4,120.00 kJ/mol   
33
3,900.00 kJ/mol   
99+
Electrochemical Equivalent
1.89 g/amp-hr   
33
1.79 g/amp-hr   
37
Electron Work Function
2.50 eV   
99+
3.20 eV   
34
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Corrosion, Flammable, Ionization   
Atomic Properties
Atomic Number
63   
99+
60   
99+
Electron Configuration
[Xe] 4f7 6s2   
[Xe] 4f4 6s2   
Crystal Structure
Body Centered Cubic (BCC)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
DHCP-Crystal-Structure-of-Neodymium.jpg#100   
Atom
  
  
Number of Protons
63   
99+
60   
99+
Number of Neutrons
89   
38
84   
40
Number of Electrons
63   
99+
60   
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm   
14
181.00 pm   
13
Covalent Radius
198.00 pm   
13
201.00 pm   
10
Van der Waals Radius
233.00 pm   
18
229.00 pm   
20
Atomic Weight
151.96 amu   
99+
144.24 amu   
99+
Atomic Volume
28.90 cm3/mol   
8
20.60 cm3/mol   
18
Adjacent Atomic Numbers
  
  
Previous Element
Samarium
  
Praseodymium
  
Next Element
Gadolinium
  
Promethium
  
Valence Electron Potential
45.60 (-eV)   
35
43.40 (-eV)   
99+
Lattice Constant
458.10 pm   
17
365.80 pm   
30
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
Not Available   
1.61   
4
Mechanical Properties
Density
  
  
Density At Room Temperature
5.26 g/cm3   
99+
7.01 g/cm3   
99+
Density When Liquid (at m.p.)
5.13 g/cm3   
99+
6.89 g/cm3   
36
Tensile Strength
120.00 MPa   
15
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
19.40 (Pa)   
4
0.00 (Pa)   
21
Vapor Pressure at 2000 K
Not Available   
101.00 (Pa)   
2
Elasticity properties
  
  
Shear Modulus
7.90 GPa   
99+
16.30 GPa   
38
Bulk Modulus
8.30 GPa   
99+
31.80 GPa   
37
Young's Modulus
18.20 GPa   
99+
41.40 GPa   
40
Poisson Ratio
0.15   
34
0.28   
16
Other Mechanical Properties
Ductile   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.24   
99+
7.00   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
NA   
Resistivity
0.90 nΩ·m   
99+
643.00 nΩ·m   
6
Electrical Conductivity
0.01 106/cm Ω   
99+
0.02 106/cm Ω   
99+
Electron Affinity
50.00 kJ/mol   
21
50.00 kJ/mol   
21
Thermal Properties
Specific Heat
0.18 J/(kg K)   
33
0.19 J/(kg K)   
32
Molar Heat Capacity
27.66 J/mol·K   
16
27.45 J/mol·K   
17
Thermal Conductivity
13.90 W/m·K   
99+
16.50 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
35.00 µm/(m·K)   
8
9.60 µm/(m·K)   
99+
Enthalpy
  
  
Enthalpy of Vaporization
143.50 kJ/mol   
99+
273.00 kJ/mol   
34
Enthalpy of Fusion
9.21 kJ/mol   
37
7.14 kJ/mol   
99+
Enthalpy of Atomization
180.00 kJ/mol   
99+
322.00 kJ/mol   
32
Standard Molar Entropy
77.80 J/mol.K   
4
71.50 J/mol.K   
13
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