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What is Iridium?
Iridium


Periodic Table
0
Symbol
Ir 0
Group Number
9 9
Period Number
6 2
Block
d block 0
Element Family
Transition Metal 0
CAS Number
7439885 89
Space Group Name
Fm_ 3m 0
Space Group Number
225.00 2
Facts
0
Interesting Facts
  • Iridium element occurs as natural alloys of Platinum and Osmium.
  • Iridium element is known as the most corrosion resistance metal .
0
Sources
Found in Minerals, Mining, Ores of Minerals 0
History
0
Who Discovered
Smithson Tennant 0
Discovery
In 1803 0
Abundance
0
Abundance In Universe
2 * 10-7 % 22
Abundance In Sun
~0.0000002 % 25
Abundance In Meteorites
0.00 % 29
Abundance In Earth's Crust
0.00 % 56
Abundance In Oceans
Not Available 0
Abundance In Humans
Not Available 0
Uses
0
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.
0
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry 0
Medical Uses
NA 0
Other Uses
Alloys 0
Biological Properties
0
Toxicity
Toxic 0
Present in Human Body
Yes 0
In Blood
Not Available 0
In Bone
Not Available 0
Physical
0
Melting Point
2,410.00 °C 7
Boiling Point
4,527.00 °C 10
Appearance
0
Physical State
Solid 0
Color
Silvery White 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
6.50 5
Brinell Hardness
1,670.00 MPa 5
Vickers Hardness
1,760.00 MPa 3
Speed of Sound
4,825.00 m/s 13
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
78.00 % 6
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Ir 0
Isotopes
0
Known Isotopes
34 5
Electronegativity
0
Pauling Electronegativity
2.20 4
Sanderson Electronegativity
Not Available 0
Allred Rochow Electronegativity
1.55 11
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
1.68 17
Electropositivity
0
Pauling Electropositivity
1.80 49
Ionization Energies
0
1st Energy Level
880.00 kJ/mol 9
2nd Energy Level
1,600.00 kJ/mol 35
3rd Energy Level
Not Available 0
4th Energy Level
Not Available 0
5th Energy Level
Not Available 0
6th Energy Level
Not Available 0
7th Energy level
Not Available 0
8th Energy Level
Not Available 0
9th Energy Level
Not Available 0
10th Energy Level
Not Available 0
11th Energy Level
Not Available 0
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
1.14 g/amp-hr 54
Electron Work Function
4.55 eV 13
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity 0
Atomic
0
Atomic Number
77 39
Electron Configuration
[Xe] 4f14 5d7 6s2 0
Crystal Structure
Face Centered Cubic (FCC) 0
Crystal Lattice
FCC-Crystal-Structure-of-Iridium.jpg#100 0
Atom
0
Number of Protons
74 41
Number of Neutrons
110 27
Number of Electrons
74 41
Radius of an Atom
0
Atomic Radius
136.00 pm 41
Covalent Radius
141.00 pm 43
Van der Waals Radius
202.00 pm 27
Atomic Weight
192.22 amu 34
Atomic Volume
9.53 cm3/mol 50
Adjacent Atomic Numbers
0
Previous Element
44 0
Next Element
20 0
Valence Electron Potential
140.00 (-eV) 5
Lattice Constant
383.90 pm 26
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
22.56 g/cm3 10
Density When Liquid (at m.p.)
19.00 g/cm3 3
Tensile Strength
2,000.00 MPa 2
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
Not Available 0
Vapor Pressure at 2000 K
0.00 (Pa) 25
Elasticity properties
0
Shear Modulus
210.00 GPa 2
Bulk Modulus
320.00 GPa 3
Young's Modulus
528.00 GPa 1
Poisson Ratio
0.26 22
Other Mechanical Properties
NA 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
21.78 3
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
Conductor 0
Resistivity
47.10 nΩ·m 44
Electrical Conductivity
0.19 106/cm Ω 10
Electron Affinity
151.00 kJ/mol 4
Thermal
0
Specific Heat
0.13 J/(kg K) 39
Molar Heat Capacity
25.10 J/mol·K 43
Thermal Conductivity
147.00 W/m·K 10
Critical Temperature
Not Available 0
Thermal Expansion
6.40 µm/(m·K) 51
Enthalpy
0
Enthalpy of Vaporization
799.10 kJ/mol 1
Enthalpy of Fusion
35.23 kJ/mol 1
Enthalpy of Atomization
837.00 kJ/mol 1
Standard Molar Entropy
35.50 J/mol.K 43
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