Lanthanum Rhenium Comparison
Periodic Table
Symbol
La
Re
Group Number
Not Available
7
11
Period Number
6
6
Block
f block
d block
Element Family
Lanthanide
Transition Metal
CAS Number
7439910
99+
7440155
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
- Chemical properties of Rhenium are similar to Manganese.
- Rhenium metal is created while refining Molybdenum.
Sources
Found in Minerals, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Carl Gustaf Mosander
Masataka Ogawa
Discovery
In 1838
In 1908
Abundance
Abundance In Universe
2 * 10-7 %
22
2 * 10-8 %
29
Abundance In Sun
~0.0000002 %
25
~0.00000001 %
29
Abundance In Meteorites
0.00 %
32
0.00 %
99+
Abundance In Earth's Crust
0.00 %
19
0.00 %
99+
Abundance In Oceans
0.00 %
29
0.00 %
34
Uses
Uses & Benefits
- It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
- The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
- 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.
Industrial Uses
Electrical Industry, Electronic Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys, Mirror Manufacturing
Alloys
Biological Properties
Toxicity
Low Toxic
Low Toxic
Present in Human Body
Yes
No
In Bone
0.08 p.p.m.
24
Not Available
Physical Properties
Melting Point
920.00 °C
99+
3,180.00 °C
2
Boiling Point
3,469.00 °C
18
5,627.00 °C
2
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery Gray
Luster
NA
Metallic
Hardness
Mohs Hardness
2.50
14
7.00
3
Brinell Hardness
350.00 MPa
30
1,320.00 MPa
8
Vickers Hardness
360.00 MPa
26
1,350.00 MPa
7
Speed of Sound
2,475.00 m/s
37
4,700.00 m/s
15
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
La
Re
Isotopes
Known Isotopes
31
8
33
6
Electronegativity
Pauling Electronegativity
1.10
99+
1.90
11
Allred Rochow Electronegativity
1.08
31
1.46
15
Allen Electronegativity
Not Available
1.60
21
Electropositivity
Pauling Electropositivity
2.90
10
2.10
99+
Ionization Energies
1st Energy Level
538.10 kJ/mol
99+
760.00 kJ/mol
20
2nd Energy Level
1,067.00 kJ/mol
99+
1,260.00 kJ/mol
99+
3rd Energy Level
1,850.30 kJ/mol
99+
2,510.00 kJ/mol
99+
4th Energy Level
4,819.00 kJ/mol
22
3,640.00 kJ/mol
99+
5th Energy Level
5,940.00 kJ/mol
25
Not Available
Electrochemical Equivalent
1.73 g/amp-hr
99+
0.99 g/amp-hr
99+
Electron Work Function
3.50 eV
31
4.96 eV
7
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
57
99+
75
99+
Electron Configuration
[Xe] 5d2 6s2
[Xe] 4f14 5d5 6s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
57
99+
75
40
Number of Neutrons
82
99+
111
26
Number of Electrons
57
99+
75
40
Radius of an Atom
Atomic Radius
187.00 pm
8
137.00 pm
40
Covalent Radius
207.00 pm
6
151.00 pm
34
Van der Waals Radius
240.00 pm
13
200.00 pm
28
Atomic Weight
138.91 amu
99+
186.21 amu
36
Atomic Volume
20.73 cm3/mol
16
8.85 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
40.71 (-eV)
99+
180.00 (-eV)
3
Lattice Constant
377.20 pm
28
276.10 pm
99+
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.62
2
1.62
3
Mechanical Properties
Density
Density At Room Temperature
6.16 g/cm3
99+
21.02 g/cm3
12
Density When Liquid (at m.p.)
5.94 g/cm3
99+
18.90 g/cm3
4
Tensile Strength
Not Available
1,070.00 MPa
3
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.98 (Pa)
15
0.00 (Pa)
29
Elasticity properties
Shear Modulus
14.30 GPa
40
178.00 GPa
3
Bulk Modulus
27.90 GPa
99+
370.00 GPa
2
Young's Modulus
36.60 GPa
99+
463.00 GPa
2
Poisson Ratio
0.28
17
0.30
14
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
6.17
99+
21.02
5
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
615.00 nΩ·m
7
193.00 nΩ·m
20
Electrical Conductivity
0.01 106/cm Ω
99+
0.05 106/cm Ω
33
Electron Affinity
48.00 kJ/mol
23
14.50 kJ/mol
35
Thermal Properties
Specific Heat
0.19 J/(kg K)
32
0.13 J/(kg K)
39
Molar Heat Capacity
27.11 J/mol·K
21
25.48 J/mol·K
38
Thermal Conductivity
13.40 W/m·K
99+
48.00 W/m·K
31
Critical Temperature
Not Available
Not Available
Thermal Expansion
12.10 µm/(m·K)
32
6.20 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
399.60 kJ/mol
17
707.10 kJ/mol
3
Enthalpy of Fusion
6.20 kJ/mol
99+
33.05 kJ/mol
2
Enthalpy of Atomization
431.00 kJ/mol
16
791.00 kJ/mol
2
Standard Molar Entropy
56.90 J/mol.K
23
36.90 J/mol.K
99+
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