Ir
metal· Ir
Iridium (Ir) is a dense, silvery-white transition metal belonging to the platinum group metals (PGMs), prized for its exceptional corrosion resistance, high melting point, and outstanding hardness. It is employed in demanding aerospace, chemical processing, and high-temperature applications where extreme durability and chemical inertness are non-negotiable; engineers select iridium when conventional materials fail due to oxidation, corrosion, or thermal degradation, though its scarcity and cost typically limit use to critical-path components or small high-value parts.
spark plug electrodescrucibles and refractory vesselscatalytic converters and chemical reactorsaerospace heat shields and engine componentsmedical implants and electrodesjewelry and precision instruments
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 346.3 | GPa | — | ||
| ↳ | 348.1 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1745 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2413 | - | — | ||
| ↳ | 0.2500 | - | — | ||
Shear Modulus(G)2 entries | 216.5 | GPa | — | ||
| ↳ | 216.9 | GPa | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 21.80 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -1.620 | µV/K | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | 0.000 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.