What is Iridium?

Iridium

Periodic Table

Symbol

Group Number

9 9

Period Number

6 2

Block

d block

Element Family

Transition Metal

CAS Number

7439885 89

Space Group Name

Fm_ 3m

Space Group Number

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 .

Sources

Found in Minerals, Mining, Ores of Minerals

History

Who Discovered

Smithson Tennant

Discovery

In 1803

Abundance

Abundance In Universe

0.00 % 23

Abundance In Sun

0.00 % 25

Abundance In Meteorites

0.00 % 29

Abundance In Earth's Crust

0.00 % 56

Abundance In Oceans

Abundance In Humans

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.

Industrial Uses

Automobile Industry, Electrical Industry, Electronic Industry

Medical Uses

Other Uses

Alloys

Biological Properties

Toxicity

Toxic

Present in Human Body

Yes

In Blood

0.00 Blood/mg dm-3 40

In Bone

0.00 p.p.m. 41

Physical

Melting Point

2,410.00 °C 7

Boiling Point

4,527.00 °C 10

Appearance

Physical State

Solid

Color

Silvery White

Luster

Metallic

Hardness

Mohs Hardness

6.50 5

Brinell Hardness

1,670.00 MPa 5

Vickers Hardness

1,760.00 MPa 8

Speed of Sound

4,825.00 m/s 17

Optical Properties

Refractive Index

2.40 7

Reflectivity

78.00 % 8

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

34 5

Electronegativity

Pauling Electronegativity

2.20 5

Sanderson Electronegativity

2.20 8

Allred Rochow Electronegativity

1.55 12

Mulliken-Jaffe Electronegativity

2.20 6

Allen Electronegativity

1.68 20

Electropositivity

Pauling Electropositivity

1.80 50

Ionization Energies

1st Energy Level

880.00 kJ/mol 9

2nd Energy Level

1,600.00 kJ/mol 36

3rd Energy Level

2,256.10 kJ/mol 62

4th Energy Level

880.00 kJ/mol 80

5th Energy Level

8,800.00 kJ/mol 8

6th Energy Level

8,800.00 kJ/mol 25

7th Energy level

8,800.00 kJ/mol 22

8th Energy Level

8,800.00 kJ/mol 22

9th Energy Level

8,800.00 kJ/mol 21

10th Energy Level

8,800.00 kJ/mol 23

11th Energy Level

8,800.00 kJ/mol 20

12th Energy Level

8,800.00 kJ/mol 40

13th Energy Level

8,800.00 kJ/mol 15

14th Energy Level

8,800.00 kJ/mol 14

15th Energy Level

88,000.00 kJ/mol 8

16th Energy Level

88,000.00 kJ/mol 9

17th Energy Level

880.00 kJ/mol 26

18th Energy Level

8,800.00 kJ/mol 15

19th Energy Level

880.00 kJ/mol 24

20th Energy Level

880.00 kJ/mol 14

21st Energy Level

880.00 kJ/mol 37

22nd Energy Level

880.00 kJ/mol 12

23rd Energy Level

8,800.00 kJ/mol 7

24th Energy Level

880.00 kJ/mol 8

25th Energy Level

880.00 kJ/mol 6

26th Energy Level

880.00 kJ/mol 6

27th Energy Level

880.00 kJ/mol 5

28th Energy Level

880.00 kJ/mol 8

29th Energy Level

880.00 kJ/mol 9

30th Energy Level

880.00 kJ/mol 6

Electrochemical Equivalent

1.14 g/amp-hr 58

Electron Work Function

4.55 eV 18

Other Chemical Properties

Flammable, Ionization, Radioactive Isotopes, Radioactivity

Atomic

Atomic Number

77 39

Electron Configuration

[Xe] 4f¹⁴ 5d⁷ 6s²

Crystal Structure

Face Centered Cubic (FCC)

Crystal Lattice

FCC-Crystal-Structure-of-Iridium.jpg#100

Atom

Number of Protons

74 41

Number of Neutrons

110 28

Number of Electrons

74 41

Radius of an Atom

Atomic Radius

136.00 pm 43

Covalent Radius

141.00 pm 45

Van der Waals Radius

202.00 pm 34

Atomic Weight

192.22 amu 34

Atomic Volume

9.53 cm3/mol 68

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

140.00 (-eV) 5

Lattice Constant

383.90 pm 29

Lattice Angles

π/2, π/2, π/2

Lattice C/A Ratio

1.58 35

Mechanical

Density

Density At Room Temperature

22.56 g/cm³ 10

Density When Liquid (at m.p.)

19.00 g/cm3 13

Tensile Strength

2,000.00 MPa 2

Viscosity

0.00 21

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa) 37

Vapor Pressure at 2000 K

0.00 (Pa) 26

Elasticity properties

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

Magnetic

Magnetic Characteristics

Specific Gravity

21.78 12

Magnetic Ordering

Paramagnetic

Permeability

0.00 H/m 16

Susceptibility

0.00 5

Electrical Properties

Electrical Property

Conductor

Resistivity

47.10 nΩ·m 44

Electrical Conductivity

0.19 10⁶/cm Ω 10

Electron Affinity

151.00 kJ/mol 4

Thermal

Specific Heat

0.13 J/(kg K) 40

Molar Heat Capacity

25.10 J/mol·K 52

Thermal Conductivity

147.00 W/m·K 10

Critical Temperature

2,719.00 K 8

Thermal Expansion

6.40 µm/(m·K) 66

Enthalpy

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 60

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