Rhenium Platinum Comparison
Periodic Table
Symbol
Re
Pt
Group Number
7
11
10
8
Period Number
6
6
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440155
99+
7440064
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
Facts
Interesting Facts
- Chemical properties of Rhenium are similar to Manganese.
- Rhenium metal is created while refining Molybdenum.
- Platinum is the rarest metal from the Precious metal categories..
- Commercially Platinum is produced as a byproduct in ores of nickel.
Sources
Found in Minerals, Mining, Ores of Minerals
Mining, Ores of metals, Ores of Minerals
History
Who Discovered
Masataka Ogawa
Antonio de Ulloa
Discovery
In 1908
In 1735
Abundance
Abundance In Universe
2 * 10-8 %
29
5 * 10-7 %
19
Abundance In Sun
~0.00000001 %
29
~0.0000009 %
19
Abundance In Meteorites
0.00 %
99+
0.00 %
25
Abundance In Earth's Crust
0.00 %
99+
0.00 %
99+
Abundance In Oceans
0.00 %
34
Not Available
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.
- Platinum metal is mainly used in jewellery.
- Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Aerospace Industry, Chemical Industry
Medical Uses
NA
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
Other Uses
Alloys
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Biological Properties
Toxicity
Low Toxic
Non Toxic
Present in Human Body
No
No
Physical Properties
Melting Point
3,180.00 °C
2
1,772.00 °C
16
Boiling Point
5,627.00 °C
2
3,827.00 °C
15
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
7.00
3
3.50
11
Brinell Hardness
1,320.00 MPa
8
300.00 MPa
34
Vickers Hardness
1,350.00 MPa
7
400.00 MPa
25
Speed of Sound
4,700.00 m/s
15
2,800.00 m/s
29
Optical Properties
Reflectivity
Not Available
73.00 %
8
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
Pt
Isotopes
Known Isotopes
33
6
35
4
Electronegativity
Pauling Electronegativity
1.90
11
2.28
3
Allred Rochow Electronegativity
1.46
15
1.44
17
Allen Electronegativity
1.60
21
1.72
16
Electropositivity
Pauling Electropositivity
2.10
99+
1.72
99+
Ionization Energies
1st Energy Level
760.00 kJ/mol
20
870.00 kJ/mol
10
2nd Energy Level
1,260.00 kJ/mol
99+
1,791.00 kJ/mol
21
3rd Energy Level
2,510.00 kJ/mol
99+
Not Available
4th Energy Level
3,640.00 kJ/mol
99+
Not Available
Electrochemical Equivalent
0.99 g/amp-hr
99+
1.82 g/amp-hr
35
Electron Work Function
4.96 eV
7
5.65 eV
1
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Solubility
Chemical Stability, Anti Corrosion, Ionization
Atomic Properties
Atomic Number
75
99+
78
38
Electron Configuration
[Xe] 4f14 5d5 6s2
[Xe] 4f14 5d9 6s1
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
FCC-Crystal-Structure-of-Platinum.jpg#100
Atom
Number of Protons
75
40
78
38
Number of Neutrons
111
26
117
24
Number of Electrons
75
40
78
38
Radius of an Atom
Atomic Radius
137.00 pm
40
139.00 pm
39
Covalent Radius
151.00 pm
34
136.00 pm
99+
Van der Waals Radius
200.00 pm
28
175.00 pm
36
Atomic Weight
186.21 amu
36
47.87 amu
99+
Atomic Volume
8.85 cm3/mol
99+
9.09 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
392.42 (-eV)
1
Lattice Constant
276.10 pm
99+
392.42 pm
24
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
21.45 g/cm3
11
Density When Liquid (at m.p.)
18.90 g/cm3
4
19.77 g/cm3
2
Tensile Strength
1,070.00 MPa
3
125.00 MPa
14
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.00 (Pa)
29
0.07 (Pa)
18
Elasticity properties
Shear Modulus
178.00 GPa
3
61.00 GPa
14
Bulk Modulus
370.00 GPa
2
230.00 GPa
6
Young's Modulus
463.00 GPa
2
168.00 GPa
14
Poisson Ratio
0.30
14
0.38
6
Other Mechanical Properties
Ductile, Malleable
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
21.02
5
21.45
4
Magnetic Ordering
Paramagnetic
Paramagnetic
Permeability
Not Available
0.00 H/m
3
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
193.00 nΩ·m
20
105.00 nΩ·m
30
Electrical Conductivity
0.05 106/cm Ω
33
0.10 106/cm Ω
21
Electron Affinity
14.50 kJ/mol
35
205.30 kJ/mol
2
Thermal Properties
Specific Heat
0.13 J/(kg K)
39
0.13 J/(kg K)
39
Molar Heat Capacity
25.48 J/mol·K
38
25.86 J/mol·K
35
Thermal Conductivity
48.00 W/m·K
31
71.60 W/m·K
24
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.20 µm/(m·K)
99+
8.80 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
707.10 kJ/mol
3
510.50 kJ/mol
11
Enthalpy of Fusion
33.05 kJ/mol
2
19.70 kJ/mol
12
Enthalpy of Atomization
791.00 kJ/mol
2
565.00 kJ/mol
11
Standard Molar Entropy
36.90 J/mol.K
99+
41.60 J/mol.K
36
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