Au2Cu1In1
Au2Cu1In1 is a semiconducting ternary intermetallic compound composed of gold, copper, and indium that exhibits a high degree of structural complexity.
About Au2Cu1In1
Au2Cu1In1 is a ternary intermetallic compound composed of gold, copper, and indium. As a semiconducting material, it represents a unique intersection of noble and post-transition metals, offering a distinct electronic profile for researchers investigating complex metallic systems. The compound is characterized by significant structural diversity, with numerous reported configurations documented in materials databases. While it is currently identified as being above the thermodynamic hull, its complex structural landscape makes it a subject of interest for understanding metastable phase formation in multi-component alloy systems.
Key Properties
Cross-validated computational properties for Au2Cu1In1, 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 Au2Cu1In1, 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 | 1.37 | 1.1234 | -2.345 | 1.10 |
| I4/mmm (No. 139) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmm2 (No. 35) | — | — | — | — | — |
Applications
Where Au2Cu1In1 is used.
Frequently Asked Questions
Common questions about Au2Cu1In1, answered from cross-validated data.
What is Au2Cu1In1?
Au2Cu1In1 is a semiconducting ternary intermetallic compound composed of gold, copper, and indium that exhibits a high degree of structural complexity.
What is Au2Cu1In1 used for?
What is the band gap of Au2Cu1In1?
Is Au2Cu1In1 a metal, semiconductor, or insulator?
Is Au2Cu1In1 thermodynamically stable?
What is the crystal structure of Au2Cu1In1?
What is the density of Au2Cu1In1?
How many polymorphs of Au2Cu1In1 are known?
What elements does Au2Cu1In1 contain?
Where does the data for Au2Cu1In1 come from?
How It Compares
As a ternary intermetallic phase, Au2Cu1In1 occupies a specialized niche in materials science where the interplay between gold, copper, and indium dictates its semiconducting nature. Unlike more common binary alloys, this compound demonstrates the intricate structural complexity often found in systems where multiple metallic species must accommodate varying atomic radii and valence electron contributions.
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 Au2Cu1In1 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →