Co1Cu1Hf2
Co1Cu1Hf2 is a semimetallic ternary compound containing cobalt, copper, and hafnium that exists in a metastable state.
About Co1Cu1Hf2
Co1Cu1Hf2 is a ternary intermetallic compound composed of cobalt, copper, and hafnium. It exhibits a semimetallic electronic character, placing it in a regime where its conduction properties are highly sensitive to its specific atomic arrangement.
Due to its position above the thermodynamic stability hull, this compound is considered metastable. Its existence across multiple reported structures suggests a complex phase landscape, making it a subject of interest for fundamental studies in materials science and structural chemistry.
Key Properties
Cross-validated computational properties for Co1Cu1Hf2, aggregated across 2 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 Co1Cu1Hf2, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 0.00 | 0.1139 | -8.029 | 12.28 |
| Immm (No. 71) | orthorhombic | 0.08 | 3.4963 | -4.647 | 1.34 |
| C2/m (No. 12) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Co1Cu1Hf2, answered from cross-validated data.
What is Co1Cu1Hf2?
Co1Cu1Hf2 is a semimetallic ternary compound containing cobalt, copper, and hafnium that exists in a metastable state.
What is the band gap of Co1Cu1Hf2?
Is Co1Cu1Hf2 a metal, semiconductor, or insulator?
Is Co1Cu1Hf2 thermodynamically stable?
What is the crystal structure of Co1Cu1Hf2?
What is the density of Co1Cu1Hf2?
How many polymorphs of Co1Cu1Hf2 are known?
What elements does Co1Cu1Hf2 contain?
Where does the data for Co1Cu1Hf2 come from?
How It Compares
As a unique ternary phase, Co1Cu1Hf2 represents a distinct point in the compositional space of cobalt-copper-hafnium alloys. Lacking direct structural siblings in this specific class, it serves as a case study for understanding how the integration of transition metals and heavy refractory elements influences electronic behavior in metastable intermetallics.
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).
Analyze Co1Cu1Hf2 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →