CoIrLa2
CoIrLa2 is a semiconducting ternary alloy composed of cobalt, iridium, and lanthanum that is primarily studied for its structural and electronic properties.
About CoIrLa2
CoIrLa2 is a complex ternary alloy featuring cobalt, iridium, and lanthanum. As a member of the platinum-group alloy catalyst class, it exhibits semiconducting electronic behavior, making it an intriguing subject for research into specialized catalytic surfaces and electronic materials.
While this compound has been identified across multiple structural databases, its thermodynamic profile indicates it sits above the stability hull. This suggests that while it can be synthesized in specific structural configurations, it remains a metastable phase of significant interest for fundamental materials science studies.
Key Properties
Cross-validated computational properties for CoIrLa2, aggregated across 3 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.
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.
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.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for CoIrLa2, 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. |
|---|---|---|---|---|---|
| Immm (No. 71) | orthorhombic | 0.21 | 1.9758 | -4.953 | 0.90 |
| I-4m2 (No. 119) | — | — | — | — | — |
| — | — | — | — | — | 9.63 |
| — | — | — | — | — | 9.84 |
| — | — | — | — | — | 10.69 |
| — | — | — | — | — | 10.69 |
| — | — | — | — | — | 10.69 |
| — | — | — | — | — | 10.69 |
Applications
Where CoIrLa2 is used.
Frequently Asked Questions
Common questions about CoIrLa2, answered from cross-validated data.
What is CoIrLa2?
CoIrLa2 is a semiconducting ternary alloy composed of cobalt, iridium, and lanthanum that is primarily studied for its structural and electronic properties.
What is CoIrLa2 used for?
What is the band gap of CoIrLa2?
Is CoIrLa2 a metal, semiconductor, or insulator?
Is CoIrLa2 thermodynamically stable?
What is the crystal structure of CoIrLa2?
What is the density of CoIrLa2?
How many polymorphs of CoIrLa2 are known?
What elements does CoIrLa2 contain?
Where does the data for CoIrLa2 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Compared to more common or stable platinum-group alloys like LaRh or IrSe2, CoIrLa2 occupies a more precarious thermodynamic position. While many of its class members are characterized by high stability, CoIrLa2 represents a more elusive phase that challenges our understanding of how transition metal and lanthanide combinations influence electronic properties in catalytic systems.
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).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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