LaMg
LaMg is a stable metallic compound formed from lanthanum and magnesium that is frequently studied for its structural properties.
About LaMg
LaMg is a metallic intermetallic compound composed of lanthanum 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 across diverse synthesis conditions.
Its metallic nature and structural reliability make it a subject of significant interest in materials science. With numerous reported structures documented across various databases, it serves as a foundational example for understanding binary lanthanide-magnesium systems and their potential for specialized metallurgical applications.
Key Properties
Cross-validated computational properties for LaMg, aggregated across 7 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 LaMg. 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 LaMg, 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. |
|---|---|---|---|---|---|
| Pm-3m (No. 221) | cubic | 0.00 | 0.0000 | -0.114 | — |
| Pm-3m (No. 221) | cubic | 0.00 | 0.0000 | -0.114 | — |
| Pmma (No. 51) | orthorhombic | 0.00 | 0.0000 | -3.384 | 4.39 |
| — | — | 0.00 | 0.0000 | -0.115 | — |
| — | — | 0.00 | 0.0003 | -0.115 | — |
| Pm-3m (No. 221) | cubic | 0.00 | 0.0057 | -3.378 | 4.31 |
| — | — | 0.00 | 0.0150 | -0.100 | — |
| Cmmm (No. 65) | orthorhombic | 0.00 | 0.0325 | -3.352 | 4.42 |
| — | — | 0.00 | 0.0383 | -0.077 | — |
| — | — | 0.00 | 0.0399 | -0.076 | — |
| — | — | 0.00 | 0.0639 | -0.051 | — |
| Amm2 (No. 38) | orthorhombic | 0.00 | 0.0666 | -3.317 | 4.40 |
Applications
Where LaMg is used.
Frequently Asked Questions
Common questions about LaMg, answered from cross-validated data.
What is LaMg?
LaMg is a stable metallic compound formed from lanthanum and magnesium that is frequently studied for its structural properties.
What is LaMg used for?
What is the band gap of LaMg?
Is LaMg a metal, semiconductor, or insulator?
Is LaMg thermodynamically stable?
What is the crystal structure of LaMg?
How many polymorphs of LaMg are known?
What elements does LaMg contain?
Where does the data for LaMg come from?
How It Compares
As a stable binary intermetallic, LaMg occupies a central role in the study of lanthanum-magnesium phases, providing a benchmark for structural stability and metallic bonding character in this specific alloy system.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
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