Cobalt Platinum Comparison
Periodic Table
Symbol
Co
Pt
Group Number
9
9
10
8
Period Number
4
6
Block
d block
d block
Element Family
Transition Metal
Transition Metal
CAS Number
7440484
38
7440064
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
Facts
Interesting Facts
- The main source of Cobalt is as a by-product of copper and nickel metal mining.
- Cobalt metal can be obtained from other elements like Oxygen, Sulfur and Arsenic.
- It s also used in electroplating process as it exhibits anti cession properties.
- Platinum is the rarest metal from the Precious metal categories..
- Commercially Platinum is produced as a byproduct in ores of nickel.
Sources
Found in Compounds, Mining, Ores of Minerals
Mining, Ores of metals, Ores of Minerals
History
Who Discovered
Georg Brandt
Antonio de Ulloa
Discovery
In 1732
In 1735
Abundance
Abundance In Universe
3 * 10-4 %
9
5 * 10-7 %
19
Abundance In Sun
~0.0004 %
9
~0.0000009 %
19
Abundance In Meteorites
0.06 %
10
0.00 %
25
Abundance In Earth's Crust
0.00 %
21
0.00 %
99+
Abundance In Oceans
0.00 %
20
Not Available
Abundance In Humans
0.00 %
17
Not Available
Uses
Uses & Benefits
- Its alloys with aluminum and nickel are used to make powerful magnets.
- Few other alloys exhibit high-temperature strength and hence they are used in Turbines of Jet and Gas engine.
- Platinum metal is mainly used in jewellery.
- Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
Industrial Uses
Chemical Industry, Electrical Industry, Electronic Industry
Aerospace Industry, Chemical Industry
Medical Uses
Pharmaceutical Industry
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing
Other Uses
Alloys
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Biological Properties
Toxicity
Toxic
Non Toxic
Present in Human Body
Yes
No
In Blood
0.04 Blood/mg dm-3
18
Not Available
In Bone
0.04 p.p.m.
27
Not Available
Physical Properties
Melting Point
1,495.00 °C
29
1,772.00 °C
16
Boiling Point
2,870.00 °C
34
3,827.00 °C
15
Appearance
Physical State
Solid
Solid
Color
Gray
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
5.00
8
3.50
11
Brinell Hardness
470.00 MPa
26
300.00 MPa
34
Vickers Hardness
1,043.00 MPa
11
400.00 MPa
25
Speed of Sound
4,720.00 m/s
14
2,800.00 m/s
29
Optical Properties
Reflectivity
67.00 %
11
73.00 %
8
Allotropes
Yes
No
α Allotropes
α-Cobalt
Not Available
β Allotropes
β-Cobalt
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Co
Pt
Isotopes
Known Isotopes
26
13
35
4
Electronegativity
Pauling Electronegativity
1.88
12
2.28
3
Sanderson Electronegativity
2.56
1
Not Available
Allred Rochow Electronegativity
1.70
5
1.44
17
Allen Electronegativity
1.84
10
1.72
16
Electropositivity
Pauling Electropositivity
2.12
99+
1.72
99+
Ionization Energies
1st Energy Level
760.40 kJ/mol
19
870.00 kJ/mol
10
2nd Energy Level
1,648.00 kJ/mol
31
1,791.00 kJ/mol
21
3rd Energy Level
3,232.00 kJ/mol
22
Not Available
4th Energy Level
4,950.00 kJ/mol
19
Not Available
5th Energy Level
7,670.00 kJ/mol
12
Not Available
6th Energy Level
9,840.00 kJ/mol
12
Not Available
7th Energy level
12,440.00 kJ/mol
11
Not Available
8th Energy Level
15,230.00 kJ/mol
12
Not Available
9th Energy Level
17,959.00 kJ/mol
13
Not Available
10th Energy Level
26,570.00 kJ/mol
7
Not Available
11th Energy Level
29,400.00 kJ/mol
8
Not Available
12th Energy Level
32,400.00 kJ/mol
8
Not Available
13th Energy Level
36,600.00 kJ/mol
8
Not Available
14th Energy Level
39,700.00 kJ/mol
9
Not Available
15th Energy Level
42,800.00 kJ/mol
12
Not Available
16th Energy Level
49,396.00 kJ/mol
11
Not Available
17th Energy Level
52,737.00 kJ/mol
13
Not Available
18th Energy Level
134,810.00 kJ/mol
1
Not Available
19th Energy Level
145,170.00 kJ/mol
2
Not Available
20th Energy Level
154,700.00 kJ/mol
4
Not Available
21st Energy Level
167,400.00 kJ/mol
4
Not Available
22nd Energy Level
178,100.00 kJ/mol
3
Not Available
23rd Energy Level
189,300.00 kJ/mol
3
Not Available
Electrochemical Equivalent
1.10 g/amp-hr
99+
1.82 g/amp-hr
35
Electron Work Function
5.00 eV
5
5.65 eV
1
Other Chemical Properties
Chemical Stability, Ionization
Chemical Stability, Anti Corrosion, Ionization
Atomic Properties
Atomic Number
22
99+
78
38
Electron Configuration
[Ar] 3d2 4s2
[Xe] 4f14 5d9 6s1
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
HCP-Crystal-Structure-of-Cobalt.jpg#100
FCC-Crystal-Structure-of-Platinum.jpg#100
Atom
Number of Protons
22
99+
78
38
Number of Neutrons
26
99+
117
24
Number of Electrons
22
99+
78
38
Radius of an Atom
Atomic Radius
147.00 pm
34
139.00 pm
39
Covalent Radius
160.00 pm
30
136.00 pm
99+
Van der Waals Radius
200.00 pm
28
175.00 pm
36
Atomic Weight
47.87 amu
99+
47.87 amu
99+
Atomic Volume
10.64 cm3/mol
99+
9.09 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
95.20 (-eV)
10
392.42 (-eV)
1
Lattice Constant
295.08 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
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
4.51 g/cm3
99+
21.45 g/cm3
11
Density When Liquid (at m.p.)
4.11 g/cm3
99+
19.77 g/cm3
2
Tensile Strength
434.00 MPa
9
125.00 MPa
14
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
0.98 (Pa)
14
0.07 (Pa)
18
Elasticity properties
Shear Modulus
44.00 GPa
17
61.00 GPa
14
Bulk Modulus
110.00 GPa
15
230.00 GPa
6
Young's Modulus
116.00 GPa
18
168.00 GPa
14
Poisson Ratio
0.32
12
0.38
6
Other Mechanical Properties
Ductile
Ductile, Malleable
Magnetic Properties
Magnetic Characteristics
Specific Gravity
4,500.00
1
21.45
4
Magnetic Ordering
Paramagnetic
Paramagnetic
Permeability
Not Available
0.00 H/m
3
Electrical Properties
Electrical Property
Poor Conductor
Conductor
Resistivity
420.00 nΩ·m
12
105.00 nΩ·m
30
Electrical Conductivity
0.02 106/cm Ω
99+
0.10 106/cm Ω
21
Electron Affinity
7.60 kJ/mol
37
205.30 kJ/mol
2
Thermal Properties
Specific Heat
0.52 J/(kg K)
9
0.13 J/(kg K)
39
Molar Heat Capacity
25.06 J/mol·K
99+
25.86 J/mol·K
35
Thermal Conductivity
21.90 W/m·K
99+
71.60 W/m·K
24
Critical Temperature
Not Available
Not Available
Thermal Expansion
8.60 µm/(m·K)
99+
8.80 µm/(m·K)
99+
Enthalpy
Enthalpy of Vaporization
429.00 kJ/mol
15
510.50 kJ/mol
11
Enthalpy of Fusion
15.48 kJ/mol
19
19.70 kJ/mol
12
Enthalpy of Atomization
468.60 kJ/mol
15
565.00 kJ/mol
11
Standard Molar Entropy
27.30 J/mol.K
99+
41.60 J/mol.K
36
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