GaMg
GaMg is a stable metallic intermetallic compound composed of gallium and magnesium.
About GaMg
GaMg is a metallic intermetallic compound formed from gallium and magnesium. As a thermodynamically stable phase located on the convex hull, it represents a robust structural arrangement of these two elements, reflecting a favorable energetic state that persists under standard conditions. Its metallic character suggests high electrical and thermal conductivity, which are characteristic of its constituent elements in this binary configuration. The compound is supported by a significant body of structural data, highlighting its importance in fundamental materials research. Its stability and predictable formation make it a subject of interest for understanding alloy behavior and phase development in binary metallic systems.
Key Properties
Cross-validated computational properties for GaMg, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of GaMg. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for GaMg, 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. |
|---|---|---|---|---|---|
| I41/a (No. 88) | tetragonal | 0.00 | 0.0000 | -2.463 | 4.12 |
| P4/mmm (No. 123) | tetragonal | 0.00 | 0.0169 | -2.446 | 4.26 |
| Pm-3m (No. 221) | cubic | 0.00 | 0.0221 | -2.440 | 4.23 |
| Pmma (No. 51) | orthorhombic | 0.00 | 0.0243 | -2.438 | 4.20 |
| Cm (No. 8) | monoclinic | 0.00 | 0.0422 | -2.420 | 4.11 |
| Amm2 (No. 38) | orthorhombic | 0.00 | 0.0440 | -2.419 | 4.14 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0466 | -2.416 | 4.01 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0525 | -7.917 | 4.14 |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.0548 | -2.408 | 4.07 |
| C2 (No. 5) | monoclinic | 0.00 | 0.0591 | -2.403 | 4.13 |
| R-3m (No. 166) | trigonal | 0.00 | 0.0618 | -2.401 | 4.08 |
| Pmmn (No. 59) | orthorhombic | 0.00 | 0.0691 | -2.393 | 3.87 |
Applications
Where GaMg is used.
Frequently Asked Questions
Common questions about GaMg, answered from cross-validated data.
What is GaMg?
GaMg is a stable metallic intermetallic compound composed of gallium and magnesium.
What is GaMg used for?
What is the band gap of GaMg?
Is GaMg a metal, semiconductor, or insulator?
Is GaMg thermodynamically stable?
What is the crystal structure of GaMg?
What is the density of GaMg?
How many polymorphs of GaMg are known?
What elements does GaMg contain?
Where does the data for GaMg come from?
How It Compares
As a binary intermetallic, GaMg serves as a foundational example of phase stability within the gallium-magnesium system. Without other specific siblings in this immediate class for direct comparison, it stands as a primary reference point for studying the interaction between group thirteen and group two elements in metallic bonding environments.
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).
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