Au1Ga1Mg2
Au1Ga1Mg2 is a semimetallic ternary intermetallic compound composed of gold, gallium, and magnesium.
About Au1Ga1Mg2
Au1Ga1Mg2 is a ternary intermetallic compound composed of gold, gallium, and magnesium. Its electronic character is defined as near-zero-gap, placing it in the category of semimetallic materials that often exhibit unique transport properties due to the proximity of their valence and conduction bands.
While this material has been identified across multiple structural configurations in computational databases, its thermodynamic status above the hull suggests it is likely unstable under standard conditions. Its study is primarily focused on understanding the complex phase space of gold-gallium-magnesium alloys.
Key Properties
Cross-validated computational properties for Au1Ga1Mg2, 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 Au1Ga1Mg2, 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 | 0.05 | 1.3922 | -1.377 | 0.56 |
| Imm2 (No. 44) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Au1Ga1Mg2, answered from cross-validated data.
What is Au1Ga1Mg2?
Au1Ga1Mg2 is a semimetallic ternary intermetallic compound composed of gold, gallium, and magnesium.
What is the band gap of Au1Ga1Mg2?
Is Au1Ga1Mg2 a metal, semiconductor, or insulator?
Is Au1Ga1Mg2 thermodynamically stable?
What is the crystal structure of Au1Ga1Mg2?
What is the density of Au1Ga1Mg2?
How many polymorphs of Au1Ga1Mg2 are known?
What elements does Au1Ga1Mg2 contain?
Where does the data for Au1Ga1Mg2 come from?
How It Compares
As a ternary intermetallic, Au1Ga1Mg2 represents a specialized case within the broader landscape of complex metallic alloys, where the interplay between noble metal, post-transition metal, and alkaline earth components creates a sensitive energy landscape.
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).
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