Symbol
Ir
Group Number
9
Rank: 9 (Overall)
0
17
👆🏻
Period Number
6
Rank: 2 (Overall)
2
7
👆🏻
Block
d block
Element Family
Transition Metal
CAS Number
7439885
Rank: 89 (Overall)
7429905
54386242
👆🏻
Space Group Name
Fm_ 3m
Space Group Number
225.00
Rank: 3 (Overall)
11
276
👆🏻
Interesting Facts
- 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
History
Who Discovered
Smithson Tennant
Discovery
In 1803
Abundance
Abundance In Universe
0.00 %
Rank: 23 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 25 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.00 %
Rank: 29 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 56 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
-
0
1.1
👆🏻
Abundance In Humans
0.00 %
Rank: 24 (Overall)
0
1.4
👆🏻
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.
Industrial Uses
Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
-
Other Uses
Alloys
Biological Properties
Toxicity
Toxic
Present in Human Body
✔
✘
60% - Transition Metals Metals have it !
In Blood
0.00 Blood/mg dm-3
Rank: 40 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Melting Point
2,410.00 °C
Rank: 7 (Overall)
-38.83
3410
👆🏻
Boiling Point
4,527.00 °C
Rank: 10 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silvery White
Luster
Metallic
Hardness
Mohs Hardness
6.50
Rank: 5 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
1,670.00 MPa
Rank: 5 (Overall)
0.14
3490
👆🏻
Vickers Hardness
1,760.00 MPa
Rank: 8 (Overall)
0
3920
👆🏻
Speed of Sound
4,825.00 m/s
Rank: 17 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
2.40
Rank: 7 (Overall)
0.155
3.41
👆🏻
Reflectivity
78.00 %
Rank: 8 (Overall)
5
97
👆🏻
Allotropes
✔
✘
6% - Transition Metals Metals
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical Formula
Ir
Isotopes
Known Isotopes
34
Rank: 5 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
2.20
Rank: 5 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
2.20
Rank: 8 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.55
Rank: 12 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
2.20
Rank: 6 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.68
Rank: 20 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
1.80
Rank: 50 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
880.00 kJ/mol
Rank: 9 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,600.00 kJ/mol
Rank: 36 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,256.10 kJ/mol
Rank: 62 (Overall)
392.8
34230
👆🏻
4th Energy Level
880.00 kJ/mol
Rank: 80 (Overall)
375.7
37066
👆🏻
5th Energy Level
8,800.00 kJ/mol
Rank: 8 (Overall)
392
97510
👆🏻
6th Energy Level
8,800.00 kJ/mol
Rank: 25 (Overall)
1007
105800
👆🏻
7th Energy level
8,800.00 kJ/mol
Rank: 22 (Overall)
1007
114300
👆🏻
8th Energy Level
8,800.00 kJ/mol
Rank: 22 (Overall)
730
125300
👆🏻
9th Energy Level
8,800.00 kJ/mol
Rank: 21 (Overall)
1007
134700
👆🏻
10th Energy Level
8,800.00 kJ/mol
Rank: 23 (Overall)
392
144300
👆🏻
11th Energy Level
8,800.00 kJ/mol
Rank: 20 (Overall)
392
169988
👆🏻
12th Energy Level
8,800.00 kJ/mol
Rank: 40 (Overall)
0
189368
👆🏻
13th Energy Level
8,800.00 kJ/mol
Rank: 15 (Overall)
1007
76015
👆🏻
14th Energy Level
8,800.00 kJ/mol
Rank: 14 (Overall)
380
86450
👆🏻
15th Energy Level
88,000.00 kJ/mol
Rank: 8 (Overall)
33000
100700
👆🏻
16th Energy Level
88,000.00 kJ/mol
Rank: 9 (Overall)
375.7
109480
👆🏻
17th Energy Level
880.00 kJ/mol
Rank: 26 (Overall)
375.7
122200
👆🏻
18th Energy Level
8,800.00 kJ/mol
Rank: 15 (Overall)
0
134810
👆🏻
19th Energy Level
880.00 kJ/mol
Rank: 24 (Overall)
375.7
148700
👆🏻
20th Energy Level
880.00 kJ/mol
Rank: 14 (Overall)
0
171200
👆🏻
21st Energy Level
880.00 kJ/mol
Rank: 37 (Overall)
375.7
179100
👆🏻
22nd Energy Level
880.00 kJ/mol
Rank: 12 (Overall)
330
184900
👆🏻
23rd Energy Level
8,800.00 kJ/mol
Rank: 7 (Overall)
357.6
198800
👆🏻
24th Energy Level
880.00 kJ/mol
Rank: 8 (Overall)
297.3
195200
👆🏻
25th Energy Level
880.00 kJ/mol
Rank: 6 (Overall)
0
121900
👆🏻
26th Energy Level
880.00 kJ/mol
Rank: 6 (Overall)
357.6
127700
👆🏻
27th Energy Level
880.00 kJ/mol
Rank: 5 (Overall)
0
133800
👆🏻
28th Energy Level
880.00 kJ/mol
Rank: 8 (Overall)
297.3
139800
👆🏻
29th Energy Level
880.00 kJ/mol
Rank: 9 (Overall)
0
148100
👆🏻
30th Energy Level
880.00 kJ/mol
Rank: 6 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
1.14 g/amp-hr
Rank: 58 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
4.55 eV
Rank: 18 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Flammable, Ionization, Radioactive Isotopes, Radioactivity
Atomic Number
77
Rank: 39 (Overall)
3
117
👆🏻
Electron Configuration
[Xe] 4f14 5d7 6s2
Crystal Structure
Face Centered Cubic (FCC)
Crystal Lattice
Atom
Number of Protons
74
Rank: 41 (Overall)
3
117
👆🏻
Number of Neutrons
110
Rank: 28 (Overall)
4
285
👆🏻
Number of Electrons
74
Rank: 41 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
136.00 pm
Rank: 43 (Overall)
0
348
👆🏻
Covalent Radius
141.00 pm
Rank: 45 (Overall)
0
260
👆🏻
Van der Waals Radius
202.00 pm
Rank: 34 (Overall)
0
348
👆🏻
Atomic Weight
192.22 amu
Rank: 34 (Overall)
6.94
294
👆🏻
Atomic Volume
9.53 cm3/mol
Rank: 68 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
140.00 (-eV)
Rank: 5 (Overall)
0
392.42
👆🏻
Lattice Constant
383.90 pm
Rank: 29 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, π/2
Lattice C/A Ratio
1.58
Rank: 35 (Overall)
0.423
1.9
👆🏻
Density
Density At Room Temperature
22.56 g/cm3
Rank: 10 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
19.00 g/cm3
Rank: 13 (Overall)
0.512
41
👆🏻
Tensile Strength
2,000.00 MPa
Rank: 2 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 21 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 37 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 26 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
210.00 GPa
Rank: 2 (Overall)
1.3
222
👆🏻
Bulk Modulus
320.00 GPa
Rank: 3 (Overall)
0
462
👆🏻
Young's Modulus
528.00 GPa
Rank: 1 (Overall)
0
528
👆🏻
Poisson Ratio
0.26
Rank: 22 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
-
Magnetic Characteristics
Specific Gravity
21.78
Rank: 12 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 16 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 5 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
Conductor
Resistivity
47.10 nΩ·m
Rank: 44 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.19 106/cm Ω
Rank: 10 (Overall)
0
0.63
👆🏻
Electron Affinity
151.00 kJ/mol
Rank: 4 (Overall)
0
222.8
👆🏻
Specific Heat
0.13 J/(kg K)
Rank: 40 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
25.10 J/mol·K
Rank: 52 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
147.00 W/m·K
Rank: 10 (Overall)
0
429
👆🏻
Critical Temperature
2,719.00 K
Rank: 8 (Overall)
26.3
3695
👆🏻
Thermal Expansion
6.40 µm/(m·K)
Rank: 66 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
799.10 kJ/mol
Rank: 1 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
35.23 kJ/mol
Rank: 1 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
837.00 kJ/mol
Rank: 1 (Overall)
61.5
837
👆🏻
Standard Molar Entropy
35.50 J/mol.K
Rank: 60 (Overall)
9.5
198.1
👆🏻