HoMg
HoMg is a stable intermetallic compound formed from holmium and magnesium that exhibits metallic electronic properties.
About HoMg
HoMg is a binary intermetallic compound composed of holmium and magnesium. As a metallic system, it exhibits characteristic electronic behavior and maintains a high degree of structural integrity, being identified as a thermodynamically stable phase that sits directly on the convex hull.
Its stability and well-documented structural diversity across multiple databases make it a significant subject for researchers studying rare-earth magnesium alloys. The compound serves as a fundamental building block for understanding the phase relationships and bonding characteristics within binary metallic systems.
Key Properties
Cross-validated computational properties for HoMg, aggregated across 5 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 HoMg. 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 HoMg, 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 | -3.165 | 5.85 |
| Pm-3m (No. 221) | Cubic | — | — | — | 5.84 |
| Pm-3m (No. 221) | Cubic | — | — | — | 5.48 |
| Pm-3m (No. 221) | Cubic | — | — | — | 5.40 |
| R-3m (No. 166) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 5.84 |
| No. 0 | unknown | — | — | — | 5.45 |
| No. 0 | unknown | — | — | — | 5.86 |
| Pm-3m (No. 221) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 5.93 |
| No. 0 | unknown | — | — | — | 5.92 |
Applications
Where HoMg is used.
Frequently Asked Questions
Common questions about HoMg, answered from cross-validated data.
What is HoMg?
HoMg is a stable intermetallic compound formed from holmium and magnesium that exhibits metallic electronic properties.
What is HoMg used for?
What is the band gap of HoMg?
Is HoMg a metal, semiconductor, or insulator?
Is HoMg thermodynamically stable?
What is the crystal structure of HoMg?
What is the density of HoMg?
How many polymorphs of HoMg are known?
What elements does HoMg contain?
Where does the data for HoMg come from?
How It Compares
As a stable binary metallic compound, HoMg represents a well-defined point in the phase space of holmium-magnesium alloys. Without other specific siblings in this immediate class for comparison, it stands as a baseline example of a thermodynamically favored intermetallic phase that maintains structural consistency across various synthesis conditions.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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