MgRh2Sb
MgRh2Sb is a semimetallic ternary alloy containing magnesium, rhodium, and antimony that shows promise for synthesis and catalytic research.
About MgRh2Sb
MgRh2Sb is a complex ternary intermetallic compound classified within the platinum-group alloy family. Its electronic structure is characterized as a near-zero-gap semimetal, placing it in a unique position between traditional metallic conductors and semiconducting materials.
This compound is considered thermodynamically stable and sits near the convex hull, suggesting it is a viable candidate for experimental synthesis. Its structural complexity and electronic properties make it a subject of interest for researchers investigating specialized catalytic and electronic applications.
Key Properties
Cross-validated computational properties for MgRh2Sb, 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 MgRh2Sb, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 0.00 | 0.0070 | -5.636 | 9.32 |
| Immm (No. 71) | orthorhombic | 0.05 | 2.5673 | -3.076 | 0.68 |
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| — | — | — | — | — | 8.53 |
Applications
Where MgRh2Sb is used.
Frequently Asked Questions
Common questions about MgRh2Sb, answered from cross-validated data.
What is MgRh2Sb?
MgRh2Sb is a semimetallic ternary alloy containing magnesium, rhodium, and antimony that shows promise for synthesis and catalytic research.
What is MgRh2Sb used for?
What is the band gap of MgRh2Sb?
Is MgRh2Sb a metal, semiconductor, or insulator?
Is MgRh2Sb thermodynamically stable?
What is the crystal structure of MgRh2Sb?
What is the density of MgRh2Sb?
How many polymorphs of MgRh2Sb are known?
What elements does MgRh2Sb contain?
Where does the data for MgRh2Sb come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse family of platinum-group alloys, MgRh2Sb occupies a distinct niche compared to binary counterparts like P3Ru or BaPd. While many members of this class are explored for their specific catalytic surface activities, MgRh2Sb's ternary composition and semimetallic nature provide a different electronic landscape for potential chemical interactions compared to the more conventional metallic behavior seen in materials like LaRh or GeRu.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- alexandria — Data from alexandria.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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