Iridium

Overview

English Name:

Iridium

Latin Name:

Iridium

Year Discovered:

1803

Discovered By:

Smithson Tennant

Group:

9

Period:

6

Electrons:

77

CAS Number:

7439-88-5

Cost Per 100 Grams:

$5,000

Atomic Properties

Electronic Configuration:

[Xe] 4f¹⁴ 5d⁶ 6s²

Ion Charge:

+3, +4

Ionisation Energies:

880.0 kJ/mol

Atomic Radius (Empirical):

136 pm

Atomic Radius (Calculated):

202 pm

Covalent Radius:

151 pm

Van Der Waals Radius:

N/A

Ionisation Potential of An Atom:

8.967 eV

Electrons Per Layer:

2, 8, 18, 32, 15, 2

Atomic Multiplicities Of The Gas:

1

Atomic Weight:

192.22

Reactivity

Electron Affinity:

0.0 kJ/mol

Valence:

3, 4

Electronegativity:

2.20

Thermal Properties

Melting Point:

2446°C

Boiling Point:

4428°C

Critical Point:

Pressure: N/A

Temperature: N/A

Thermal Conductivity:

147 W/(m·K)

Heat Capacity:

Specific: 0.13 J/(g·K)

Molar: 25.1 J/(mol·K)

Thermal Coefficient:

0.000006

Enthalpy:

Fusion: 26.1 kJ/mol

Vaporisation: 560 kJ/mol

Atomization: N/A

Curie Temperature:

N/A

Neel Temperature:

N/A

Superconductivity Point:

N/A

Physical and Chemical Properties

State of matter (25° C/ 77°F):

Solid

Density:

Solid: 22.56 g/cm³

Molar Volume (Vmol):

8.52 cm³/mol

Speed of Sound (Vs):

4825 m/s

Hardness:

6-7

Bulk Modulus (K):

320 GPa

Shear Modulus (G):

210 GPa

Young's Modulus (E):

528 GPa

Color:

Silvery-white

Brinell Hardness (MPa):

1760

Liquid Density (Kg/m^3):

N/A

Hardness of Mohs:

6-7

Refractive Index:

N/A

Vickers Hardness (MPa):

N/A

Crystal Structure:

Face-centered cubic (FCC)

Electromagnetic Properties

Electrical Type:

Conductor

Resistivity:

4.7 × 10^-7 Ω·m

Magnetic Type:

Paramagnetic

Superconductivity:

Not applicable

Volume Magnetic Susceptibility:

0.0 × 10^-6

Mass Magnetic Susceptibility:

0.0 × 10^-6 m³/kg

Molar Mass Susceptibility:

0.0 × 10^-6 m³/mol

Electrical Conductivity:

2.1 × 10^6 S/m

Mass (γ_mass):

1.0 × 10^-25 kg

Mass (γ_mol):

1.0 × 10^-22 mol

Volume (γ_vol):

8.52 L

Grid Parameters

Crystal Structure:

Face-centered cubic (FCC)

Grid Parameters:

a = 383.8 pm

Attitude:

N/A

Debye Temperature:

N/A

Safety and Precautions

Signal Word:

Warning

Hazard Statements:

H228

Precautionary Statements:

P220, P244, P370 + P376

RTECS Number:

Not available

Risk:

Flammability: Flammable solid
Health Risk: Irritant
Reactivity: Stable
Specific Risk: None

Importance

Main sources:

Minerals, ores

Main Usage:

Alloys, catalysts

Nuclear Properties

Radioactive:

No

Isotopes:

Ir-191, Ir-193

Neutron Cross Sectional:

0.0 barns

Half Life (s):

None

Lifetime:

Stable

Prevalence

Universe:

0.0001%

Sun:

0.0001%

Oceans:

0.0%

Humans:

0.0%

Earth's Crust:

0.0001%

Meteorites:

0.0001%