Au2CuY
Au2CuY is a semiconducting ternary intermetallic compound composed of gold, copper, and yttrium that exhibits metastable characteristics.
About Au2CuY
Au2CuY is a ternary intermetallic compound characterized by its semiconducting electronic nature. Its composition, involving gold, copper, and yttrium, places it in a specialized category of materials that are subject to ongoing structural investigation across multiple databases. Due to its position relative to the thermodynamic hull, this compound is considered metastable. The existence of several reported structural variations suggests a complex energy landscape that influences its potential for synthesis and practical utility in advanced material research.
Key Properties
Cross-validated computational properties for Au2CuY, aggregated across 3 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 Au2CuY, 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 | 0.16 | 1.9497 | -2.975 | 0.86 |
| — | — | — | — | — | 11.58 |
| — | — | — | — | — | — |
| — | — | — | — | — | — |
Applications
Where Au2CuY is used.
Frequently Asked Questions
Common questions about Au2CuY, answered from cross-validated data.
What is Au2CuY?
Au2CuY is a semiconducting ternary intermetallic compound composed of gold, copper, and yttrium that exhibits metastable characteristics.
What is Au2CuY used for?
What is the band gap of Au2CuY?
Is Au2CuY a metal, semiconductor, or insulator?
Is Au2CuY thermodynamically stable?
What is the crystal structure of Au2CuY?
What is the density of Au2CuY?
How many polymorphs of Au2CuY are known?
What elements does Au2CuY contain?
Where does the data for Au2CuY come from?
How It Compares
As a unique ternary phase, Au2CuY represents a specific point in the vast configuration space of gold-copper-yttrium alloys. While it lacks direct siblings in this specific dataset, its role as a semiconducting intermetallic highlights the diversity of electronic behaviors possible in complex metallic systems, distinguishing it from more common metallic conductors.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- alexandria — Data from alexandria.
Analyze Au2CuY in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →