Co4Fe4
Co4Fe4 is a thermodynamically stable metallic compound formed from cobalt and iron that is widely documented in structural materials research.
About Co4Fe4
Co4Fe4 is a metallic intermetallic compound composed of cobalt and iron. As a thermodynamically stable phase located on the convex hull, it represents a robust structural arrangement of these transition metals, making it a subject of significant interest in metallurgical studies.
With a high degree of data richness and numerous reported structures across multiple databases, this compound serves as a critical reference point for understanding binary alloy systems. Its metallic character and stability suggest potential utility in applications requiring durable, conductive metallic frameworks.
Key Properties
Cross-validated computational properties for Co4Fe4, 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 Co4Fe4, 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. |
|---|---|---|---|---|---|
| Pm-3m (No. 221) | cubic | 0.00 | 0.0000 | -7.857 | 8.33 |
| Cmmm (No. 65) | orthorhombic | 0.00 | 0.1031 | -7.754 | 8.39 |
| Amm2 (No. 38) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| P1 (No. 1) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Pm (No. 6) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| P-1 (No. 2) | — | — | — | — | — |
Applications
Where Co4Fe4 is used.
Frequently Asked Questions
Common questions about Co4Fe4, answered from cross-validated data.
What is Co4Fe4?
Co4Fe4 is a thermodynamically stable metallic compound formed from cobalt and iron that is widely documented in structural materials research.
What is Co4Fe4 used for?
What is the band gap of Co4Fe4?
Is Co4Fe4 a metal, semiconductor, or insulator?
Is Co4Fe4 thermodynamically stable?
What is the crystal structure of Co4Fe4?
What is the density of Co4Fe4?
How many polymorphs of Co4Fe4 are known?
What elements does Co4Fe4 contain?
Where does the data for Co4Fe4 come from?
How It Compares
As a distinct binary intermetallic, Co4Fe4 occupies a unique position in the landscape of cobalt-iron systems, serving as a foundational example of stable phase formation within this class of metallic alloys.
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).
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