Hg1Mg2Pt1
Hg1Mg2Pt1 is a semimetallic, metastable intermetallic alloy containing mercury, magnesium, and platinum.
About Hg1Mg2Pt1
Hg1Mg2Pt1 is a complex intermetallic compound categorized within the platinum-group alloy catalysts. As a near-zero-gap material, it exhibits semimetallic electronic behavior that distinguishes its charge carrier dynamics from typical insulating or highly conductive alloys. Its structural complexity is evidenced by a significant number of reported configurations within material databases. Given its position above the thermodynamic hull, this compound is considered metastable or unstable under standard conditions. This thermodynamic profile makes it a subject of interest for researchers studying phase stability and the synthesis of unconventional metallic architectures in catalytic applications.
Key Properties
Cross-validated computational properties for Hg1Mg2Pt1, aggregated across 2 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 Hg1Mg2Pt1, 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 | 0.03 | 1.5756 | -1.351 | 0.59 |
| P4mm (No. 99) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
Applications
Where Hg1Mg2Pt1 is used.
Frequently Asked Questions
Common questions about Hg1Mg2Pt1, answered from cross-validated data.
What is Hg1Mg2Pt1?
Hg1Mg2Pt1 is a semimetallic, metastable intermetallic alloy containing mercury, magnesium, and platinum.
What is Hg1Mg2Pt1 used for?
What is the band gap of Hg1Mg2Pt1?
Is Hg1Mg2Pt1 a metal, semiconductor, or insulator?
Is Hg1Mg2Pt1 thermodynamically stable?
What is the crystal structure of Hg1Mg2Pt1?
What is the density of Hg1Mg2Pt1?
How many polymorphs of Hg1Mg2Pt1 are known?
What elements does Hg1Mg2Pt1 contain?
Where does the data for Hg1Mg2Pt1 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the class of platinum-group alloy catalysts, Hg1Mg2Pt1 occupies a unique niche compared to more stable, well-characterized siblings like As2Pt or GeRu. While many members of this group are prized for their robust stability and catalytic efficiency, Hg1Mg2Pt1 is distinguished by its semimetallic electronic character and its status as a metastable phase, contrasting with the more conventional bonding environments found in compounds like LaRh or BaPd.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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