Cd2Hg
Cd2Hg is a metallic intermetallic compound formed from cadmium and mercury that shows promising stability for experimental synthesis.
About Cd2Hg
Cd2Hg is a metallic intermetallic compound composed of cadmium and mercury. Its electronic structure is characterized by a lack of a band gap, identifying it as a conductor typical of metallic systems. The material exhibits near-hull thermodynamic stability, suggesting it is a viable candidate for synthesis and experimental investigation in laboratory settings.
With multiple reported structures across various databases, this compound represents a well-documented system within the cadmium-mercury binary phase space. Its existence as a stable phase makes it a subject of interest for researchers studying alloy formation and the fundamental physical interactions between these heavy group twelve elements.
Key Properties
Cross-validated computational properties for Cd2Hg, 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.
Reported Structures
Lowest-energy structures reported for Cd2Hg, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0048 | -29.854 | 10.20 |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 9.77 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 10.27 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 10.22 |
| — | — | — | — | — | 8.72 |
Applications
Where Cd2Hg is used.
Frequently Asked Questions
Common questions about Cd2Hg, answered from cross-validated data.
What is Cd2Hg?
Cd2Hg is a metallic intermetallic compound formed from cadmium and mercury that shows promising stability for experimental synthesis.
What is Cd2Hg used for?
What is the band gap of Cd2Hg?
Is Cd2Hg a metal, semiconductor, or insulator?
Is Cd2Hg thermodynamically stable?
What is the crystal structure of Cd2Hg?
What is the density of Cd2Hg?
How many polymorphs of Cd2Hg are known?
What elements does Cd2Hg contain?
Where does the data for Cd2Hg come from?
How It Compares
As a binary intermetallic, Cd2Hg serves as a unique case study in the behavior of heavy metal alloys. Without direct structural siblings in this specific dataset, it stands as a representative example of how cadmium and mercury can organize into stable, metallic crystalline lattices, providing a baseline for understanding phase stability in similar mercury-bearing systems.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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