Cu4Mg2Y2
Cu4Mg2Y2 is a semimetallic ternary intermetallic compound characterized by its structural complexity and metastable nature.
About Cu4Mg2Y2
Cu4Mg2Y2 is a complex intermetallic compound composed of copper, magnesium, and yttrium. It exhibits a near-zero-gap electronic character, placing it in the category of semimetallic materials that bridge the gap between conductors and semiconductors.
Due to its position above the thermodynamic hull, this compound is considered metastable. Despite its instability, it has been the subject of significant structural investigation, appearing frequently across multiple materials databases as researchers map the phase space of ternary copper-based alloys.
Key Properties
Cross-validated computational properties for Cu4Mg2Y2, aggregated across 4 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 Cu4Mg2Y2, 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 | 0.08 | 2.0924 | -2.198 | 0.39 |
| Cmcm (No. 63) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
Applications
Where Cu4Mg2Y2 is used.
Frequently Asked Questions
Common questions about Cu4Mg2Y2, answered from cross-validated data.
What is Cu4Mg2Y2?
Cu4Mg2Y2 is a semimetallic ternary intermetallic compound characterized by its structural complexity and metastable nature.
What is Cu4Mg2Y2 used for?
What is the band gap of Cu4Mg2Y2?
Is Cu4Mg2Y2 a metal, semiconductor, or insulator?
Is Cu4Mg2Y2 thermodynamically stable?
What is the crystal structure of Cu4Mg2Y2?
What is the density of Cu4Mg2Y2?
How many polymorphs of Cu4Mg2Y2 are known?
What elements does Cu4Mg2Y2 contain?
Where does the data for Cu4Mg2Y2 come from?
How It Compares
As a unique ternary intermetallic, Cu4Mg2Y2 serves as a specialized case study in the broader landscape of copper-magnesium-yttrium alloys, where its distinct stoichiometry and electronic properties contribute to the ongoing effort to understand phase formation in complex metallic systems.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
Analyze Cu4Mg2Y2 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →