Ca7Mg2N6
Ca7Mg2N6 is a metastable semiconducting ternary nitride compound composed of calcium, magnesium, and nitrogen.
About Ca7Mg2N6
Ca7Mg2N6 is a complex ternary nitride characterized by its semiconducting electronic nature. As a metastable phase, it represents a unique arrangement of calcium, magnesium, and nitrogen atoms that offers interesting possibilities for solid-state chemistry and materials design.
Its existence across multiple structural databases highlights its significance as a subject of ongoing investigation. Researchers study this compound to better understand the stability and bonding characteristics of alkaline earth metal nitrides in various crystalline configurations.
Key Properties
Cross-validated computational properties for Ca7Mg2N6, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Ca7Mg2N6. 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 Ca7Mg2N6, 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. |
|---|---|---|---|---|---|
| C2/m (No. 12) | monoclinic | 1.29 | 0.0612 | -0.970 | — |
| C2/m (No. 12) | monoclinic | 1.17 | 0.0799 | -8.384 | 2.76 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.80 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.81 |
| C2/m (No. 12) | monoclinic | — | — | — | 2.76 |
Applications
Where Ca7Mg2N6 is used.
Frequently Asked Questions
Common questions about Ca7Mg2N6, answered from cross-validated data.
What is Ca7Mg2N6?
Ca7Mg2N6 is a metastable semiconducting ternary nitride compound composed of calcium, magnesium, and nitrogen.
What is Ca7Mg2N6 used for?
What is the band gap of Ca7Mg2N6?
Is Ca7Mg2N6 a metal, semiconductor, or insulator?
Is Ca7Mg2N6 thermodynamically stable?
What is the crystal structure of Ca7Mg2N6?
How many polymorphs of Ca7Mg2N6 are known?
What elements does Ca7Mg2N6 contain?
Where does the data for Ca7Mg2N6 come from?
How It Compares
As a unique ternary nitride, Ca7Mg2N6 occupies a specialized niche in materials science. Without direct structural siblings in this specific class, it serves as a distinct reference point for exploring the interplay between calcium and magnesium within a nitrogen-rich lattice.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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