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Europium vs Cerium

Europium
Cerium
Cerium vs Europium


Periodic Table
Symbol
Eu  
Ce  
Group Number
Not Available  
Not Available  
Period Number
6  
6  
Block
f block  
f block  
Element Family
Lanthanide  
Lanthanide  
CAS Number
7440531  
34
7440451  
99+
Space Group Name
Im_ 3m  
P63/mmc  
Space Group Number
229.00  
1
194.00  
5
Facts
Interesting Facts
Not Available  
  • Cerium is a rare earth metal but still it is not rare at all.
  • It’s non-toxic compound Cerium sulfide has a rich red color and it is used as a pigment.
  • Cerium metal is also used in Flat screen TVs, light bulb, floodlights, etc.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Eugène-Anatole Demarçay  
Martin Heinrich Klaproth, Jöns Jakob Berzelius, Wilhelm Hisinger  
Discovery
In 1896  
In 1803  
Abundance
  
  
Abundance In Universe
5 * 10-8 %  
27
1 * 10-6 %  
16
Abundance In Sun
~0.00000005 %  
27
~0.0000004 %  
23
Abundance In Meteorites
0.00 %  
99+
0.00 %  
27
Abundance In Earth's Crust
0.00 %  
36
0.01 %  
18
Abundance In Oceans
0.00 %  
99+
0.00 %  
33
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.
  
  • It is used to include flints for cigarette lighters.
  • Its compound Cerium (Ill) Oxide is used as a catalyst; it is put inside the walls of the oven as it prevents from the buildup of cooking residues.
  
Industrial Uses
Chemical Industry  
Chemical Industry  
Medical Uses
NA  
Medical Research  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Moderately Toxic  
Present in Human Body
Yes  
Yes  
In Blood
Not Available  
0.00 Blood/mg dm-3  
30
In Bone
Not Available  
2.70 p.p.m.  
14
Physical Properties
Melting Point
822.00 °C  
99+
795.00 °C  
99+
Boiling Point
1,597.00 °C  
99+
3,257.00 °C  
23
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Lustrous  
Lustrous  
Hardness
  
  
Mohs Hardness
Not Available  
2.50  
14
Brinell Hardness
Not Available  
186.00 MPa  
99+
Vickers Hardness
167.00 MPa  
34
210.00 MPa  
32
Speed of Sound
Not Available  
2,100.00 m/s  
99+
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  
Ce  
Isotopes
  
  
Known Isotopes
31  
8
30  
9
Electronegativity
  
  
Pauling Electronegativity
1.20  
39
1.12  
99+
Sanderson Electronegativity
1.01  
22
Not Available  
Allred Rochow Electronegativity
Not Available  
1.08  
31
Electropositivity
  
  
Pauling Electropositivity
Not Available  
2.88  
11
Ionization Energies
  
  
1st Energy Level
547.10 kJ/mol  
99+
534.40 kJ/mol  
99+
2nd Energy Level
1,085.00 kJ/mol  
99+
1,050.00 kJ/mol  
99+
3rd Energy Level
2,404.00 kJ/mol  
99+
1,949.00 kJ/mol  
99+
4th Energy Level
4,120.00 kJ/mol  
33
3,547.00 kJ/mol  
99+
5th Energy Level
Not Available  
6,325.00 kJ/mol  
22
6th Energy Level
Not Available  
7,490.00 kJ/mol  
21
Electrochemical Equivalent
1.89 g/amp-hr  
33
1.74 g/amp-hr  
99+
Electron Work Function
2.50 eV  
99+
2.84 eV  
39
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic Properties
Atomic Number
63  
99+
58  
99+
Electron Configuration
[Xe] 4f7 6s2  
[Xe] 4f1 5d1 6s2  
Crystal Structure
Body Centered Cubic (BCC)  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
DHCP-Crystal-Structure-of-Cerium.jpg#100  
Atom
  
  
Number of Protons
63  
99+
58  
99+
Number of Neutrons
89  
38
82  
99+
Number of Electrons
63  
99+
58  
99+
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
14
181.80 pm  
12
Covalent Radius
198.00 pm  
13
204.00 pm  
8
Van der Waals Radius
233.00 pm  
18
235.00 pm  
17
Atomic Weight
151.96 amu  
99+
140.12 amu  
99+
Atomic Volume
28.90 cm3/mol  
8
20.67 cm3/mol  
17
Adjacent Atomic Numbers
  
  
Previous Element
Samarium
  
Lanthanum
  
Next Element
Gadolinium
  
Praseodymium
  
Valence Electron Potential
45.60 (-eV)  
35
41.78 (-eV)  
99+
Lattice Constant
458.10 pm  
17
362.00 pm  
34
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
5.26 g/cm3  
99+
6.77 g/cm3  
99+
Density When Liquid (at m.p.)
5.13 g/cm3  
99+
6.55 g/cm3  
38
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)  
34
Vapor Pressure at 2000 K
Not Available  
1.04 (Pa)  
13
Elasticity properties
  
  
Shear Modulus
7.90 GPa  
99+
13.50 GPa  
99+
Bulk Modulus
8.30 GPa  
99+
21.50 GPa  
99+
Young's Modulus
18.20 GPa  
99+
33.60 GPa  
99+
Poisson Ratio
0.15  
34
0.24  
27
Other Mechanical Properties
Ductile  
Ductile, Malleable  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.24  
99+
6.77  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
0.90 nΩ·m  
99+
828.00 nΩ·m  
3
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
0.18 J/(kg K)  
33
0.19 J/(kg K)  
32
Molar Heat Capacity
27.66 J/mol·K  
16
26.94 J/mol·K  
23
Thermal Conductivity
13.90 W/m·K  
99+
11.30 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
35.00 µm/(m·K)  
8
6.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
143.50 kJ/mol  
99+
414.00 kJ/mol  
16
Enthalpy of Fusion
9.21 kJ/mol  
37
5.46 kJ/mol  
99+
Enthalpy of Atomization
180.00 kJ/mol  
99+
381.00 kJ/mol  
23
Standard Molar Entropy
77.80 J/mol.K  
4
72.00 J/mol.K  
12
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