CaMgCd2
CaMgCd2 is a thermodynamically stable, semimetallic ternary intermetallic compound.
About CaMgCd2
CaMgCd2 is a ternary intermetallic compound that occupies a stable position on the convex hull, indicating significant thermodynamic robustness. Its electronic character is defined as a near-zero-gap semimetal, placing it in a distinct category of materials that bridge the gap between metallic conductors and semiconductors.
This material is of interest to researchers studying complex intermetallic phases and the structural diversity of calcium-magnesium-cadmium systems. With multiple reported structures across various databases, it serves as a foundational subject for understanding phase stability and electronic behavior in multicomponent metallic systems.
Key Properties
Cross-validated computational properties for CaMgCd2, 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 CaMgCd2, 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 | 0.0000 | -1.623 | 5.01 |
| Immm (No. 71) | orthorhombic | 0.08 | 1.3080 | -0.315 | 0.30 |
| Fm-3m (No. 225) | — | — | — | — | — |
| Fm-3m (No. 225) | Cubic | — | — | — | 4.95 |
| Fm-3m (No. 225) | Cubic | — | — | — | 5.01 |
| Fm-3m (No. 225) | Cubic | — | — | — | 5.00 |
Applications
Where CaMgCd2 is used.
Frequently Asked Questions
Common questions about CaMgCd2, answered from cross-validated data.
What is CaMgCd2?
CaMgCd2 is a thermodynamically stable, semimetallic ternary intermetallic compound.
What is CaMgCd2 used for?
What is the band gap of CaMgCd2?
Is CaMgCd2 a metal, semiconductor, or insulator?
Is CaMgCd2 thermodynamically stable?
What is the crystal structure of CaMgCd2?
What is the density of CaMgCd2?
How many polymorphs of CaMgCd2 are known?
What elements does CaMgCd2 contain?
Where does the data for CaMgCd2 come from?
How It Compares
As a ternary intermetallic phase, CaMgCd2 represents a specialized structural arrangement within the broader landscape of complex metal alloys. It functions as a distinct example of how combining alkaline earth and transition metals can yield stable, semimetallic configurations that are not found in simpler binary systems.
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).
- mpaloe — Data from mpaloe.
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