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Iridium vs Platinum

Iridium
Platinum
Platinum vs Iridium


Periodic Table
Symbol
Ir  
Pt  
Group Number
9  
9
10  
8
Period Number
6  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7439885  
99+
7440064  
99+
Space Group Name
Fm_ 3m  
Fm_ 3m  
Space Group Number
225.00  
3
225.00  
3
Facts
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
  • 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
Smithson Tennant  
Antonio de Ulloa  
Discovery
In 1803  
In 1735  
Abundance
  
  
Abundance In Universe
0.00 %  
23
0.00 %  
20
Abundance In Sun
0.00 %  
25
0.00 %  
19
Abundance In Meteorites
0.00 %  
29
0.00 %  
25
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
0.00 %  
24
0.00 %  
24
Uses
Uses & Benefits
  • Iridium has an anti corrosion properties and it is used in special alloy with Osmium metal and that alloy is used in pen tips and compass bearings.
  
  • Platinum metal is mainly used in jewellery.
  • Platinum is used as an industrial catalyst in production of nitric acid, silicone and benzene.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
Aerospace Industry, Chemical Industry  
Medical Uses
-  
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
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
37
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
2,410.00 °C  
7
1,772.00 °C  
16
Boiling Point
4,527.00 °C  
10
3,827.00 °C  
15
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
3.50  
12
Brinell Hardness
1,670.00 MPa  
5
300.00 MPa  
99+
Vickers Hardness
1,760.00 MPa  
8
400.00 MPa  
99+
Speed of Sound
4,825.00 m/s  
17
2,800.00 m/s  
99+
Optical Properties
  
  
Refractive Index
2.40  
7
2.41  
6
Reflectivity
78.00 %  
8
73.00 %  
10
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ir  
Pt  
Isotopes
  
  
Known Isotopes
34  
5
35  
4
Electronegativity
  
  
Pauling Electronegativity
2.20  
5
2.28  
4
Sanderson Electronegativity
2.20  
8
2.28  
5
Allred Rochow Electronegativity
1.55  
12
1.44  
18
Mulliken-Jaffe Electronegativity
2.20  
6
2.20  
6
Allen Electronegativity
1.68  
20
1.72  
19
Electropositivity
  
  
Pauling Electropositivity
1.80  
99+
1.72  
99+
Ionization Energies
  
  
1st Energy Level
880.00 kJ/mol  
9
870.00 kJ/mol  
10
2nd Energy Level
1,600.00 kJ/mol  
36
1,791.00 kJ/mol  
22
3rd Energy Level
2,256.10 kJ/mol  
99+
2,277.00 kJ/mol  
99+
4th Energy Level
880.00 kJ/mol  
99+
8,702.00 kJ/mol  
6
5th Energy Level
8,800.00 kJ/mol  
8
8,702.00 kJ/mol  
9
6th Energy Level
8,800.00 kJ/mol  
25
8,700.00 kJ/mol  
27
7th Energy level
8,800.00 kJ/mol  
22
8,700.00 kJ/mol  
23
8th Energy Level
8,800.00 kJ/mol  
22
8,700.00 kJ/mol  
23
9th Energy Level
8,800.00 kJ/mol  
21
5,660.00 kJ/mol  
99+
10th Energy Level
8,800.00 kJ/mol  
23
8,700.00 kJ/mol  
24
11th Energy Level
8,800.00 kJ/mol  
20
8,700.00 kJ/mol  
21
12th Energy Level
8,800.00 kJ/mol  
40
8,700.00 kJ/mol  
99+
13th Energy Level
8,800.00 kJ/mol  
15
8,700.00 kJ/mol  
16
14th Energy Level
8,800.00 kJ/mol  
14
870.00 kJ/mol  
99+
15th Energy Level
88,000.00 kJ/mol  
8
87,000.00 kJ/mol  
9
16th Energy Level
88,000.00 kJ/mol  
9
870.00 kJ/mol  
99+
17th Energy Level
880.00 kJ/mol  
26
870.00 kJ/mol  
27
18th Energy Level
8,800.00 kJ/mol  
15
8,700.00 kJ/mol  
16
19th Energy Level
880.00 kJ/mol  
24
870.00 kJ/mol  
25
20th Energy Level
880.00 kJ/mol  
14
870.00 kJ/mol  
15
21st Energy Level
880.00 kJ/mol  
37
870.00 kJ/mol  
38
22nd Energy Level
880.00 kJ/mol  
12
870.00 kJ/mol  
13
23rd Energy Level
8,800.00 kJ/mol  
7
870.10 kJ/mol  
39
24th Energy Level
880.00 kJ/mol  
8
870.00 kJ/mol  
9
25th Energy Level
880.00 kJ/mol  
6
870.00 kJ/mol  
7
26th Energy Level
880.00 kJ/mol  
6
870.00 kJ/mol  
7
27th Energy Level
880.00 kJ/mol  
5
870.10 kJ/mol  
6
28th Energy Level
880.00 kJ/mol  
8
870.10 kJ/mol  
9
29th Energy Level
880.00 kJ/mol  
9
870.00 kJ/mol  
10
30th Energy Level
880.00 kJ/mol  
6
870.00 kJ/mol  
7
Electrochemical Equivalent
1.14 g/amp-hr  
99+
1.82 g/amp-hr  
39
Electron Work Function
4.55 eV  
18
5.65 eV  
4
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Anti Corrosion, Ionization  
Atomic
Atomic Number
77  
39
78  
38
Electron Configuration
[Xe] 4f14 5d7 6s2  
[Xe] 4f14 5d9 6s1  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100  
FCC-Crystal-Structure-of-Platinum.jpg#100  
Atom
  
  
Number of Protons
74  
99+
78  
38
Number of Neutrons
110  
28
117  
25
Number of Electrons
74  
99+
78  
38
Radius of an Atom
  
  
Atomic Radius
136.00 pm  
99+
139.00 pm  
99+
Covalent Radius
141.00 pm  
99+
136.00 pm  
99+
Van der Waals Radius
202.00 pm  
34
175.00 pm  
99+
Atomic Weight
192.22 amu  
34
47.87 amu  
99+
Atomic Volume
9.53 cm3/mol  
99+
9.09 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Osmium
  
Iridium
  
Next Element
Platinum
  
Gold
  
Valence Electron Potential
140.00 (-eV)  
5
392.42 (-eV)  
1
Lattice Constant
383.90 pm  
29
392.42 pm  
27
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.58  
35
1.56  
99+
Mechanical
Density
  
  
Density At Room Temperature
22.56 g/cm3  
10
21.45 g/cm3  
11
Density When Liquid (at m.p.)
19.00 g/cm3  
13
19.77 g/cm3  
12
Tensile Strength
2,000.00 MPa  
2
125.00 MPa  
26
Viscosity
0.00  
21
0.00  
16
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
26
0.07 (Pa)  
18
Elasticity properties
  
  
Shear Modulus
210.00 GPa  
2
61.00 GPa  
14
Bulk Modulus
320.00 GPa  
3
230.00 GPa  
6
Young's Modulus
528.00 GPa  
1
168.00 GPa  
15
Poisson Ratio
0.26  
22
0.38  
6
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
21.78  
12
21.45  
13
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
16
0.00 H/m  
14
Susceptibility
0.00  
5
0.00  
20
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
47.10 nΩ·m  
99+
105.00 nΩ·m  
30
Electrical Conductivity
0.19 106/cm Ω  
10
0.10 106/cm Ω  
26
Electron Affinity
151.00 kJ/mol  
4
205.30 kJ/mol  
2
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.13 J/(kg K)  
40
Molar Heat Capacity
25.10 J/mol·K  
99+
25.86 J/mol·K  
99+
Thermal Conductivity
147.00 W/m·K  
10
71.60 W/m·K  
24
Critical Temperature
2,719.00 K  
8
2,041.00 K  
19
Thermal Expansion
6.40 µm/(m·K)  
99+
8.80 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
510.50 kJ/mol  
15
Enthalpy of Fusion
35.23 kJ/mol  
1
19.70 kJ/mol  
12
Enthalpy of Atomization
837.00 kJ/mol  
1
565.00 kJ/mol  
15
Standard Molar Entropy
35.50 J/mol.K  
99+
41.60 J/mol.K  
99+
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