Co4La2
Co4La2 is a metallic intermetallic compound formed from cobalt and lanthanum that exhibits structural diversity despite its metastable nature.
About Co4La2
Co4La2 is a metallic binary intermetallic compound composed of cobalt and lanthanum. As a metallic system, it exhibits characteristic electron delocalization typical of transition metal-rare earth alloys, which influences its potential for specialized magnetic or catalytic research. Despite its existence in multiple structural databases, the compound is characterized as thermodynamically unstable relative to its constituent elements. Its presence in various structural configurations highlights the complex phase space of cobalt-lanthanum alloys, where competing phases often dictate the synthesis challenges for this specific stoichiometry.
Key Properties
Cross-validated computational properties for Co4La2, 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.
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 Co4La2, 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. |
|---|---|---|---|---|---|
| Fd-3m (No. 227) | cubic | 0.00 | 0.2059 | -18.556 | 9.15 |
| Fd-3m (No. 227) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Pnnm (No. 58) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| Fd-3m (No. 227) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| Pnnm (No. 58) | — | — | — | — | — |
Applications
Where Co4La2 is used.
Frequently Asked Questions
Common questions about Co4La2, answered from cross-validated data.
What is Co4La2?
Co4La2 is a metallic intermetallic compound formed from cobalt and lanthanum that exhibits structural diversity despite its metastable nature.
What is Co4La2 used for?
What is the band gap of Co4La2?
Is Co4La2 a metal, semiconductor, or insulator?
Is Co4La2 thermodynamically stable?
What is the crystal structure of Co4La2?
What is the density of Co4La2?
How many polymorphs of Co4La2 are known?
What elements does Co4La2 contain?
Where does the data for Co4La2 come from?
How It Compares
As a binary intermetallic in the cobalt-lanthanum system, Co4La2 represents a specific point in a diverse phase diagram where multiple stoichiometric variations are possible. Unlike more stable, well-characterized phases in this system, this compound sits in a metastable region, requiring precise control over synthesis conditions to isolate or observe its specific structural properties.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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