1 Periodic Table
1.1 Symbol
1.2 Group Number
1.3 Period Number
1.4 Block
1.5 Element Family
Transition Metal
Transition Metal
1.6 CAS Number
74398857440439
7429905
54386242
1.7 Space Group Name
1.8 Space Group Number
2 Facts
2.1 Interesting Facts
- Iridium element occurs as natural alloys of Platinum and Osmium.
- Iridium element is known as the most corrosion resistance metal .
- Naturally occurring minor elements include Cadmium.
- Cadmium is released into atmosphere to control volcanic eruption and forest fires.
- It is used for electroplating of Steel for corrosion resistance.
- It can absorb neutrons and used in nuclear reactor to control atomic fission.
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Found As a By-product, Found in Minerals, Mining
2.3 History
2.3.1 Who Discovered
Smithson Tennant
Karl Samuel Leberecht Hermann and Friedrich Stromeyer
2.3.2 Discovery
2.4 Abundance
2.4.1 Abundance In Universe
2 * 10-7 %2 * 10-7 %
5E-09
0.11
2.4.2 Abundance In Sun
~0.0000002 %~0.0000006 %
1E-08
0.1
2.4.3 Abundance In Meteorites
2.4.4 Abundance In Earth's Crust
2.4.5 Abundance In Oceans
2.4.6 Abundance In Humans
2 Uses
2.1 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.
- It has very limited uses as it is a toxic metal and it can cause birth defects, cancer, etc.
-
Almost 80% of Cadmium metal is used in Nickel cadmium Batteries and now it is getting replaced with nickel hydride.
2.1.1 Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Aerospace Industry, Ammunition Industry, Chemical Industry, Electrical Industry, Electronic Industry
2.1.2 Medical Uses
2.1.3 Other Uses
2.2 Biological Properties
2.2.1 Toxicity
2.2.2 Present in Human Body
2.2.3 In Blood
NA0.01 Blood/mg dm-3
0
1970
2.3.1 In Bone
3 Physical
3.1 Melting Point
2,410.00 °C320.90 °C
27
3410
3.4 Boiling Point
4,527.00 °C765.00 °C
147
5660
4.5 Appearance
4.5.1 Physical State
4.5.2 Color
Silvery White
Silvery Bluish-Gray
4.5.3 Luster
4.6 Hardness
4.6.1 Mohs Hardness
4.6.3 Brinell Hardness
1,670.00 MPa203.00 MPa
0.14
3490
4.6.5 Vickers Hardness
4.7 Speed of Sound
4,825.00 m/s2,310.00 m/s
818
16200
4.8 Optical Properties
4.8.1 Refractive Index
4.8.3 Reflectivity
5.3 Allotropes
5.3.1 α Allotropes
Not Available
Not Available
5.3.2 β Allotropes
Not Available
Not Available
5.3.3 γ Allotropes
Not Available
Not Available
6 Chemical
6.1 Chemical Formula
6.2 Isotopes
6.2.1 Known Isotopes
6.3 Electronegativity
6.3.1 Pauling Electronegativity
7.1.1 Sanderson Electronegativity
7.2.1 Allred Rochow Electronegativity
7.4.2 Mulliken-Jaffe Electronegativity
7.4.4 Allen Electronegativity
7.5 Electropositivity
7.5.1 Pauling Electropositivity
7.7 Ionization Energies
7.7.1 1st Energy Level
880.00 kJ/mol867.80 kJ/mol
375.7
26130
7.8.2 2nd Energy Level
1,600.00 kJ/mol1,631.40 kJ/mol
710.2162
28750
7.8.4 3rd Energy Level
NA3,616.00 kJ/mol
1600
34230
8.2.2 4th Energy Level
8.3.2 5th Energy Level
8.3.4 6th Energy Level
8.3.6 7th Energy level
8.3.8 8th Energy Level
8.3.9 9th Energy Level
8.3.11 10th Energy Level
8.4.2 11th Energy Level
8.5.2 12th Energy Level
8.5.5 13th Energy Level
8.5.7 14th Energy Level
8.5.9 15th Energy Level
8.5.11 16th Energy Level
8.5.13 17th Energy Level
8.5.15 18th Energy Level
8.5.16 19th Energy Level
8.5.18 20th Energy Level
8.5.20 21st Energy Level
8.5.22 22nd Energy Level
8.5.23 23rd Energy Level
8.5.24 24th Energy Level
8.5.26 25th Energy Level
8.5.28 26th Energy Level
8.5.29 27th Energy Level
8.5.31 28th Energy Level
8.5.32 29th Energy Level
8.5.34 30th Energy Level
8.6 Electrochemical Equivalent
1.14 g/amp-hr2.10 g/amp-hr
0.16812
8.3209
8.7 Electron Work Function
8.8 Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Chemical Stability, Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
9 Atomic
9.1 Atomic Number
9.2 Electron Configuration
[Xe] 4f14 5d7 6s2
[Kr] 4d10 5s2
9.3 Crystal Structure
Face Centered Cubic (FCC)
Hexagonal Close Packed (HCP)
9.3.1 Crystal Lattice
9.4 Atom
9.4.1 Number of Protons
9.4.4 Number of Neutrons
9.4.7 Number of Electrons
9.5 Radius of an Atom
9.5.1 Atomic Radius
136.00 pm151.00 pm
112
265
9.5.3 Covalent Radius
141.00 pm144.00 pm
96
260
9.5.6 Van der Waals Radius
202.00 pm158.00 pm
139
348
9.6 Atomic Weight
192.22 amu112.41 amu
6.94
294
9.8 Atomic Volume
9.53 cm3/mol13.10 cm3/mol
1.39
71.07
9.10 Adjacent Atomic Numbers
9.10.1 Previous Element
9.10.2 Next Element
9.11 Valence Electron Potential
140.00 (-eV)30.00 (-eV)
8
392.42
10.2 Lattice Constant
383.90 pm297.94 pm
228.58
891.25
10.6 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
10.7 Lattice C/A Ratio
11 Mechanical
11.1 Density
11.1.1 Density At Room Temperature
22.56 g/cm38.65 g/cm3
0.534
40.7
11.1.4 Density When Liquid (at m.p.)
19.00 g/cm38.00 g/cm3
0.512
20
11.3 Tensile Strength
2,000.00 MPa62.00 MPa
2.5
11000
11.5 Viscosity
11.6 Vapor Pressure
11.6.1 Vapor Pressure at 1000 K
11.7.1 Vapor Pressure at 2000 K
11.10 Elasticity properties
11.10.1 Shear Modulus
210.00 GPa19.00 GPa
1.3
222
11.11.1 Bulk Modulus
320.00 GPa42.00 GPa
1.6
462
11.13.1 Young's Modulus
528.00 GPa50.00 GPa
1.7
528
12.2 Poisson Ratio
12.3 Other Mechanical Properties
13 Magnetic
13.1 Magnetic Characteristics
13.1.1 Specific Gravity
13.2.1 Magnetic Ordering
13.2.2 Permeability
13.3.1 Susceptibility
13.5 Electrical Properties
13.5.1 Electrical Property
13.5.2 Resistivity
47.10 nΩ·m72.70 nΩ·m
0.18
961
13.6.2 Electrical Conductivity
0.19 106/cm Ω0.14 106/cm Ω
0.00666
0.63
13.6.4 Electron Affinity
151.00 kJ/mol0.00 kJ/mol
0
222.8
14 Thermal
14.1 Specific Heat
0.13 J/(kg K)0.23 J/(kg K)
0.11
3.6
14.3 Molar Heat Capacity
25.10 J/mol·K26.02 J/mol·K
16.443
62.7
14.4 Thermal Conductivity
147.00 W/m·K96.60 W/m·K
6.3
429
15.2 Critical Temperature
15.3 Thermal Expansion
6.40 µm/(m·K)30.80 µm/(m·K)
4.5
97
15.4 Enthalpy
15.4.1 Enthalpy of Vaporization
799.10 kJ/mol100.00 kJ/mol
7.32
799.1
15.5.3 Enthalpy of Fusion
35.23 kJ/mol6.19 kJ/mol
2.1
35.23
15.5.5 Enthalpy of Atomization
837.00 kJ/mol113.00 kJ/mol
61.5
837
15.6 Standard Molar Entropy
35.50 J/mol.K51.80 J/mol.K
9.5
198.1