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Nickel vs Iridium

Nickel
Iridium
Iridium vs Nickel


Periodic Table
Symbol
Ni  
Ir  
Group Number
10  
8
9  
9
Period Number
4  
6  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
7440020  
99+
7439885  
99+
Space Group Name
Fm_ 3m  
Fm_ 3m  
Space Group Number
225.00  
3
225.00  
3
Facts
Interesting Facts
  • Zinc metal found (obtain) in many forms like granules, foil, dust and in a powder form.
  • After iron, Zinc metal the second most abundant element in the earth crust.
  
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Axel Fredrik Cronstedt  
Smithson Tennant  
Discovery
In 1751  
In 1803  
Abundance
  
  
Abundance In Universe
0.01 %  
5
0.00 %  
23
Abundance In Sun
0.01 %  
3
0.00 %  
25
Abundance In Meteorites
1.30 %  
3
0.00 %  
29
Abundance In Earth's Crust
0.01 %  
15
0.00 %  
99+
Abundance In Oceans
0.00 %  
13
-  
Abundance In Humans
0.00 %  
17
0.00 %  
24
Uses
Uses & Benefits
  • It has corrosion resistance and hence it is used to plate other metals.
  • Its alloys are very useful; Nichrome alloy is used in the hot coil of toasters and electric oven.
  
  • 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.
  
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry  
Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Toxic  
Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.05 Blood/mg dm-3  
17
0.00 Blood/mg dm-3  
40
In Bone
0.70 p.p.m.  
20
0.00 p.p.m.  
99+
Physical
Melting Point
1,453.00 °C  
31
2,410.00 °C  
7
Boiling Point
2,732.00 °C  
40
4,527.00 °C  
10
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
4.00  
11
6.50  
5
Brinell Hardness
667.00 MPa  
20
1,670.00 MPa  
5
Vickers Hardness
638.00 MPa  
24
1,760.00 MPa  
8
Speed of Sound
4,900.00 m/s  
16
4,825.00 m/s  
17
Optical Properties
  
  
Refractive Index
1.68  
28
2.40  
7
Reflectivity
72.00 %  
11
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ni  
Ir  
Isotopes
  
  
Known Isotopes
25  
14
34  
5
Electronegativity
  
  
Pauling Electronegativity
1.91  
11
2.20  
5
Sanderson Electronegativity
1.94  
12
2.20  
8
Allred Rochow Electronegativity
1.75  
4
1.55  
12
Mulliken-Jaffe Electronegativity
1.91  
12
2.20  
6
Allen Electronegativity
1.88  
9
1.68  
20
Electropositivity
  
  
Pauling Electropositivity
2.09  
99+
1.80  
99+
Ionization Energies
  
  
1st Energy Level
737.10 kJ/mol  
25
880.00 kJ/mol  
9
2nd Energy Level
1,753.00 kJ/mol  
26
1,600.00 kJ/mol  
36
3rd Energy Level
3,395.00 kJ/mol  
17
2,256.10 kJ/mol  
99+
4th Energy Level
5,300.00 kJ/mol  
24
880.00 kJ/mol  
99+
5th Energy Level
7,339.00 kJ/mol  
23
8,800.00 kJ/mol  
8
6th Energy Level
10,400.00 kJ/mol  
15
8,800.00 kJ/mol  
25
7th Energy level
12,800.00 kJ/mol  
10
8,800.00 kJ/mol  
22
8th Energy Level
15,600.00 kJ/mol  
10
8,800.00 kJ/mol  
22
9th Energy Level
18,600.00 kJ/mol  
10
8,800.00 kJ/mol  
21
10th Energy Level
21,670.00 kJ/mol  
14
8,800.00 kJ/mol  
23
11th Energy Level
30,970.00 kJ/mol  
7
8,800.00 kJ/mol  
20
12th Energy Level
34,000.00 kJ/mol  
29
8,800.00 kJ/mol  
40
13th Energy Level
37,100.00 kJ/mol  
7
8,800.00 kJ/mol  
15
14th Energy Level
41,500.00 kJ/mol  
8
8,800.00 kJ/mol  
14
15th Energy Level
44,800.00 kJ/mol  
99+
88,000.00 kJ/mol  
8
16th Energy Level
48,100.00 kJ/mol  
99+
88,000.00 kJ/mol  
9
17th Energy Level
55,101.00 kJ/mol  
11
880.00 kJ/mol  
26
18th Energy Level
58,570.00 kJ/mol  
12
8,800.00 kJ/mol  
15
19th Energy Level
148,700.00 kJ/mol  
1
880.00 kJ/mol  
24
20th Energy Level
159,000.00 kJ/mol  
3
880.00 kJ/mol  
14
21st Energy Level
169,400.00 kJ/mol  
3
880.00 kJ/mol  
37
22nd Energy Level
182,700.00 kJ/mol  
2
880.00 kJ/mol  
12
23rd Energy Level
194,000.00 kJ/mol  
2
8,800.00 kJ/mol  
7
24th Energy Level
737.10 kJ/mol  
21
880.00 kJ/mol  
8
25th Energy Level
737.10 kJ/mol  
21
880.00 kJ/mol  
6
26th Energy Level
737.10 kJ/mol  
21
880.00 kJ/mol  
6
27th Energy Level
737.10 kJ/mol  
20
880.00 kJ/mol  
5
28th Energy Level
737.10 kJ/mol  
26
880.00 kJ/mol  
8
29th Energy Level
737.10 kJ/mol  
27
880.00 kJ/mol  
9
30th Energy Level
737.00 kJ/mol  
21
880.00 kJ/mol  
6
Electrochemical Equivalent
1.10 g/amp-hr  
99+
1.14 g/amp-hr  
99+
Electron Work Function
5.15 eV  
6
4.55 eV  
18
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes  
Flammable, Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
28  
99+
77  
39
Electron Configuration
[Ar] 3d8 4s2 Or [Ar] 3d9 4s1  
[Xe] 4f14 5d7 6s2  
Crystal Structure
Face Centered Cubic (FCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Nickel.jpg#100  
FCC-Crystal-Structure-of-Iridium.jpg#100  
Atom
  
  
Number of Protons
28  
99+
74  
99+
Number of Neutrons
31  
99+
110  
28
Number of Electrons
28  
99+
74  
99+
Radius of an Atom
  
  
Atomic Radius
124.00 pm  
99+
136.00 pm  
99+
Covalent Radius
124.00 pm  
99+
141.00 pm  
99+
Van der Waals Radius
163.00 pm  
99+
202.00 pm  
34
Atomic Weight
58.69 amu  
99+
192.22 amu  
34
Atomic Volume
6.59 cm3/mol  
99+
9.53 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Cobalt
  
Osmium
  
Next Element
Copper
  
Platinum
  
Valence Electron Potential
42.00 (-eV)  
99+
140.00 (-eV)  
5
Lattice Constant
352.40 pm  
99+
383.90 pm  
29
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.86  
4
1.58  
35
Mechanical
Density
  
  
Density At Room Temperature
8.91 g/cm3  
99+
22.56 g/cm3  
10
Density When Liquid (at m.p.)
7.81 g/cm3  
99+
19.00 g/cm3  
13
Tensile Strength
345.00 MPa  
13
2,000.00 MPa  
2
Viscosity
0.00  
8
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
33
0.00 (Pa)  
37
Vapor Pressure at 2000 K
19.50 (Pa)  
6
0.00 (Pa)  
26
Elasticity properties
  
  
Shear Modulus
76.00 GPa  
12
210.00 GPa  
2
Bulk Modulus
180.00 GPa  
9
320.00 GPa  
3
Young's Modulus
200.00 GPa  
12
528.00 GPa  
1
Poisson Ratio
0.31  
13
0.26  
22
Other Mechanical Properties
Ductile  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
8.90  
99+
21.78  
12
Magnetic Ordering
Ferromagnetic  
Paramagnetic  
Permeability
0.00 H/m  
2
0.00 H/m  
16
Susceptibility
600.00  
2
0.00  
5
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
69.30 nΩ·m  
39
47.10 nΩ·m  
99+
Electrical Conductivity
0.14 106/cm Ω  
14
0.19 106/cm Ω  
10
Electron Affinity
112.00 kJ/mol  
7
151.00 kJ/mol  
4
Thermal
Specific Heat
0.44 J/(kg K)  
13
0.13 J/(kg K)  
40
Molar Heat Capacity
26.07 J/mol·K  
39
25.10 J/mol·K  
99+
Thermal Conductivity
90.90 W/m·K  
18
147.00 W/m·K  
10
Critical Temperature
1,728.00 K  
35
2,719.00 K  
8
Thermal Expansion
13.40 µm/(m·K)  
34
6.40 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
371.80 kJ/mol  
29
799.10 kJ/mol  
1
Enthalpy of Fusion
17.57 kJ/mol  
14
35.23 kJ/mol  
1
Enthalpy of Atomization
422.60 kJ/mol  
22
837.00 kJ/mol  
1
Standard Molar Entropy
29.90 J/mol.K  
99+
35.50 J/mol.K  
99+
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