IrOs
Iridium osmium is a metallic alloy composed of two rare platinum-group elements. It is primarily studied for its structural stability and potential use in specialized high-performance materials.
Overview
Key Properties
Cross-validated computational properties for IrOs, aggregated across 5 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Metallic / not reported
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
0.038 eV/atom
Best (lowest) across sources
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
Metastable
3 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
102
5 databases, 25 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of IrOs. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
1.00 / 1.00
Trust tier: medium
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.000 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
2
jarvis, materials_project
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
All match
Crystallography
Reported Structures
Lowest-energy structures reported for IrOs, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.0384 | -52.634 | 22.34 |
| Pmmn (No. 59) | Orthorhombic | — | — | — | 21.53 |
| C2/m (No. 12) | Monoclinic | — | — | — | 17.69 |
| C2/m (No. 12) | Monoclinic | — | — | — | 23.27 |
| Pbcm (No. 57) | Orthorhombic | — | — | — | 22.41 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 21.32 |
| P21/c (No. 14) | Monoclinic | — | — | — | 20.60 |
| P21/c (No. 14) | Monoclinic | — | — | — | 27.11 |
| Cc (No. 9) | Monoclinic | — | — | — | 13.25 |
| C2/m (No. 12) | Monoclinic | — | — | — | 18.72 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 25.10 |
| P21/m (No. 11) | Monoclinic | — | — | — | 23.47 |
Uses
Applications
Where IrOs is used.
Scientific researchMaterials science studiesAlloy development
Reference
Frequently Asked Questions
Common questions about IrOs, answered from cross-validated data.
What is IrOs?
Iridium osmium is a metallic alloy composed of two rare platinum-group elements. It is primarily studied for its structural stability and potential use in specialized high-performance materials.
More questions
What is IrOs used for?
IrOs is used in scientific research, materials science studies, and alloy development.
What is the band gap of IrOs?
IrOs is computed to be metallic (no band gap) in the reported DFT structures.
Is IrOs a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is IrOs thermodynamically stable?
IrOs has a lowest energy above hull of 0.038 eV/atom (metastable).
What is the crystal structure of IrOs?
The lowest-energy reported polymorph of IrOs is hexagonal symmetry, space group P-6m2 (No. 187).
What is the density of IrOs?
The computed density of the ground-state structure of IrOs is 22.34 g/cm³.
How many polymorphs of IrOs are known?
102 structures of IrOs are reported across 5 databases, spanning 25 distinct space groups.
What elements does IrOs contain?
IrOs contains Ir and Os (2 elements).
Where does the data for IrOs come from?
IrOs data is cross-referenced from materials_project, mpaloe, omat24.
Explore
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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