Au2Ca1Hg1
Au2Ca1Hg1 is a semiconducting ternary intermetallic compound composed of gold, calcium, and mercury.
About Au2Ca1Hg1
Au2Ca1Hg1 is a complex ternary compound composed of gold, calcium, and mercury. As a semiconducting material, it exhibits electronic properties that distinguish it from simple metallic alloys, making it a subject of interest for fundamental solid-state research.
Due to its position above the thermodynamic hull, this compound is considered metastable, which presents unique challenges and opportunities for synthesis and characterization. Its existence within a diverse database of structural configurations highlights the intricate bonding environments possible in gold-based intermetallic systems.
Key Properties
Cross-validated computational properties for Au2Ca1Hg1, 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 Au2Ca1Hg1, 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 | 1.65 | 0.9519 | -39.023 | 0.86 |
| Cm (No. 8) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Immm (No. 71) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| Pm (No. 6) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Au2Ca1Hg1, answered from cross-validated data.
What is Au2Ca1Hg1?
Au2Ca1Hg1 is a semiconducting ternary intermetallic compound composed of gold, calcium, and mercury.
What is the band gap of Au2Ca1Hg1?
Is Au2Ca1Hg1 a metal, semiconductor, or insulator?
Is Au2Ca1Hg1 thermodynamically stable?
What is the crystal structure of Au2Ca1Hg1?
What is the density of Au2Ca1Hg1?
How many polymorphs of Au2Ca1Hg1 are known?
What elements does Au2Ca1Hg1 contain?
Where does the data for Au2Ca1Hg1 come from?
How It Compares
As a unique ternary phase, Au2Ca1Hg1 represents a specialized structural arrangement within the broader landscape of gold-calcium-mercury materials, serving as a distinct example of how stoichiometry influences the electronic behavior of complex intermetallics.
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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