GaMgY2
GaMgY2 is a complex, metastable ternary intermetallic compound that exhibits semimetallic electronic properties.
About GaMgY2
GaMgY2 is a complex ternary compound composed of gallium, magnesium, and yttrium. As a near-zero-gap material, it displays semimetallic electronic behavior, positioning it as an intriguing subject for studies into the electronic properties of unconventional intermetallic phases.
While multiple structural configurations have been documented across databases, the compound is characterized by a thermodynamic state that sits above the hull. This suggests that the phase is metastable, requiring specific synthesis conditions to stabilize its unique atomic arrangement.
Key Properties
Cross-validated computational properties for GaMgY2, 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 GaMgY2, 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 | 0.09 | 2.5460 | -2.249 | 0.32 |
| — | — | — | — | — | 3.90 |
| — | — | — | — | — | 3.90 |
| — | — | — | — | — | — |
| — | — | — | — | — | — |
Applications
Where GaMgY2 is used.
Frequently Asked Questions
Common questions about GaMgY2, answered from cross-validated data.
What is GaMgY2?
GaMgY2 is a complex, metastable ternary intermetallic compound that exhibits semimetallic electronic properties.
What is GaMgY2 used for?
What is the band gap of GaMgY2?
Is GaMgY2 a metal, semiconductor, or insulator?
Is GaMgY2 thermodynamically stable?
What is the crystal structure of GaMgY2?
What is the density of GaMgY2?
How many polymorphs of GaMgY2 are known?
What elements does GaMgY2 contain?
Where does the data for GaMgY2 come from?
How It Compares
As a unique ternary phase, GaMgY2 occupies a specialized niche in materials science where its semimetallic nature distinguishes it from more common insulating or metallic intermetallics. Without direct structural siblings in this specific class, it serves as a distinct case study for understanding how the integration of gallium, magnesium, and yttrium influences phase stability and electronic density near the Fermi level.
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.
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