AgHg
AgHg is a metastable metallic intermetallic compound formed from silver and mercury.
About AgHg
AgHg is a metallic intermetallic compound composed of silver and mercury. As a metastable phase, it represents a unique configuration of these two elements that exists outside of the standard thermodynamic ground state, making it a subject of interest for structural studies.
Its metallic nature suggests high electrical and thermal conductivity typical of silver-mercury systems. The compound is characterized by a significant degree of structural diversity, as evidenced by the numerous distinct crystalline arrangements reported across multiple research databases.
Key Properties
Cross-validated computational properties for AgHg, 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 AgHg. 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 AgHg, 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. |
|---|---|---|---|---|---|
| P213 (No. 198) | cubic | 0.00 | 0.0834 | -35.278 | 12.11 |
| Pm-3m (No. 221) | cubic | 0.00 | 0.0854 | -35.276 | 12.44 |
| P213 (No. 198) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 13.67 |
| No. 0 | unknown | — | — | — | 13.77 |
| Pmmm (No. 47) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 7.08 |
| Im-3m (No. 229) | cubic | — | — | — | 0.50 |
| Pm-3m (No. 221) | Cubic | — | — | — | 12.99 |
| No. 0 | unknown | — | — | — | 1.01 |
| Pm-3m (No. 221) | — | — | — | — | — |
| Pm-3m (No. 221) | Cubic | — | — | — | 12.86 |
Applications
Where AgHg is used.
Frequently Asked Questions
Common questions about AgHg, answered from cross-validated data.
What is AgHg?
AgHg is a metastable metallic intermetallic compound formed from silver and mercury.
What is AgHg used for?
What is the band gap of AgHg?
Is AgHg a metal, semiconductor, or insulator?
Is AgHg thermodynamically stable?
What is the crystal structure of AgHg?
What is the density of AgHg?
How many polymorphs of AgHg are known?
What elements does AgHg contain?
Where does the data for AgHg come from?
How It Compares
As a specific intermetallic phase of silver and mercury, AgHg serves as a distinct example of how these elements can organize into metastable structures, providing a reference point for understanding the complex phase behavior and bonding characteristics within the silver-mercury binary system.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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