Rhenium Europium Comparison
Periodic Table
Symbol
Re
Eu
Group Number
7
11
Not Available
Period Number
6
6
Block
d block
f block
Element Family
Transition Metal
Lanthanide
CAS Number
7440155
99+
7440531
34
Space Group Name
P63/mmc
Im_ 3m
Space Group Number
194.00
5
229.00
1
Facts
Interesting Facts
- Chemical properties of Rhenium are similar to Manganese.
- Rhenium metal is created while refining Molybdenum.
Not Available
Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Masataka Ogawa
Eugène-Anatole Demarçay
Discovery
In 1908
In 1896
Abundance
Abundance In Universe
2 * 10-8 %
29
5 * 10-8 %
27
Abundance In Sun
~0.00000001 %
29
~0.00000005 %
27
Abundance In Meteorites
0.00 %
99+
0.00 %
99+
Abundance In Earth's Crust
0.00 %
99+
0.00 %
36
Abundance In Oceans
0.00 %
34
0.00 %
99+
Uses
Uses & Benefits
- Alloys of Rhenium are used as an electric contact material. It can resist withstand arc corrosion.
- Its catalysts are used in hydrogenation of fine chemicals. Its Alloy with nickel is used to produce turbine blades.
- 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, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Chemical Industry
Medical Uses
NA
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Low Toxic
Non Toxic
Present in Human Body
No
Yes
Physical Properties
Melting Point
3,180.00 °C
2
822.00 °C
99+
Boiling Point
5,627.00 °C
2
1,597.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery White
Luster
Metallic
Lustrous
Hardness
Mohs Hardness
7.00
3
Not Available
Brinell Hardness
1,320.00 MPa
8
Not Available
Vickers Hardness
1,350.00 MPa
7
167.00 MPa
34
Speed of Sound
4,700.00 m/s
15
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
Re
Eu
Isotopes
Known Isotopes
33
6
31
8
Electronegativity
Pauling Electronegativity
1.90
11
1.20
39
Sanderson Electronegativity
Not Available
1.01
22
Allred Rochow Electronegativity
1.46
15
Not Available
Allen Electronegativity
1.60
21
Not Available
Electropositivity
Pauling Electropositivity
2.10
99+
Not Available
Ionization Energies
1st Energy Level
760.00 kJ/mol
20
547.10 kJ/mol
99+
2nd Energy Level
1,260.00 kJ/mol
99+
1,085.00 kJ/mol
99+
3rd Energy Level
2,510.00 kJ/mol
99+
2,404.00 kJ/mol
99+
4th Energy Level
3,640.00 kJ/mol
99+
4,120.00 kJ/mol
33
Electrochemical Equivalent
0.99 g/amp-hr
99+
1.89 g/amp-hr
33
Electron Work Function
4.96 eV
7
2.50 eV
99+
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
75
99+
63
99+
Electron Configuration
[Xe] 4f14 5d5 6s2
[Xe] 4f7 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
75
40
63
99+
Number of Neutrons
111
26
89
38
Number of Electrons
75
40
63
99+
Radius of an Atom
Atomic Radius
137.00 pm
40
180.00 pm
14
Covalent Radius
151.00 pm
34
198.00 pm
13
Van der Waals Radius
200.00 pm
28
233.00 pm
18
Atomic Weight
186.21 amu
36
151.96 amu
99+
Atomic Volume
8.85 cm3/mol
99+
28.90 cm3/mol
8
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
45.60 (-eV)
35
Lattice Constant
276.10 pm
99+
458.10 pm
17
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.62
3
Not Available
Mechanical Properties
Density
Density At Room Temperature
21.02 g/cm3
12
5.26 g/cm3
99+
Density When Liquid (at m.p.)
18.90 g/cm3
4
5.13 g/cm3
99+
Tensile Strength
1,070.00 MPa
3
120.00 MPa
15
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
19.40 (Pa)
4
Vapor Pressure at 2000 K
0.00 (Pa)
29
Not Available
Elasticity properties
Shear Modulus
178.00 GPa
3
7.90 GPa
99+
Bulk Modulus
370.00 GPa
2
8.30 GPa
99+
Young's Modulus
463.00 GPa
2
18.20 GPa
99+
Poisson Ratio
0.30
14
0.15
34
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
21.02
5
5.24
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
193.00 nΩ·m
20
0.90 nΩ·m
99+
Electrical Conductivity
0.05 106/cm Ω
33
0.01 106/cm Ω
99+
Electron Affinity
14.50 kJ/mol
35
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.18 J/(kg K)
33
Molar Heat Capacity
25.48 J/mol·K
38
27.66 J/mol·K
16
Thermal Conductivity
48.00 W/m·K
31
13.90 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.20 µm/(m·K)
99+
35.00 µm/(m·K)
8
Enthalpy
Enthalpy of Vaporization
707.10 kJ/mol
3
143.50 kJ/mol
99+
Enthalpy of Fusion
33.05 kJ/mol
2
9.21 kJ/mol
37
Enthalpy of Atomization
791.00 kJ/mol
2
180.00 kJ/mol
99+
Standard Molar Entropy
36.90 J/mol.K
99+
77.80 J/mol.K
4
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