CeCoGe2
CeCoGe2 is a thermodynamically stable, metallic intermetallic compound containing cerium, cobalt, and germanium that is studied for its magnetic and structural properties.
About CeCoGe2
CeCoGe2 is a metallic ternary compound composed of cerium, cobalt, and germanium. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural configuration within the rare-earth intermetallic family. Its electronic nature is defined by its metallic character, lacking a band gap, which is characteristic of many functional intermetallics in this class.
This material is of significant interest in the study of rare-earth permanent magnets and related magnetic systems. Its stability and structural consistency across multiple databases make it a reliable subject for researchers investigating the interplay between rare-earth elements and transition metals in complex lattice environments.
Key Properties
Cross-validated computational properties for CeCoGe2, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of CeCoGe2. 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.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for CeCoGe2, 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. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.0000 | -6.233 | 7.95 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 7.82 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 8.05 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 7.95 |
| — | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 3.12 |
| Cmcm (No. 63) | — | — | — | — | — |
Applications
Where CeCoGe2 is used.
Frequently Asked Questions
Common questions about CeCoGe2, answered from cross-validated data.
What is CeCoGe2?
CeCoGe2 is a thermodynamically stable, metallic intermetallic compound containing cerium, cobalt, and germanium that is studied for its magnetic and structural properties.
What is CeCoGe2 used for?
What is the band gap of CeCoGe2?
Is CeCoGe2 a metal, semiconductor, or insulator?
Is CeCoGe2 thermodynamically stable?
What is the crystal structure of CeCoGe2?
What is the density of CeCoGe2?
How many polymorphs of CeCoGe2 are known?
What elements does CeCoGe2 contain?
Where does the data for CeCoGe2 come from?
How It Compares
Within the rare-earth permanent magnets class.
Unlike many of the more complex sulfide-based members of this class, such as Al2Dy6Fe2S14 or Co2Nd8S14, CeCoGe2 maintains a simpler, more compact intermetallic structure. While its siblings often feature intricate anionic frameworks, CeCoGe2 focuses on the direct interaction between the rare-earth cerium and the transition metal cobalt, positioning it as a distinct metallic representative compared to the more chalcogenide-heavy members of the group.
Related Compounds
Other Rare-Earth Permanent Magnets 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.
- alexandria — Data from alexandria.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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