CoN
CoN is a metallic cobalt nitride compound that exists in a metastable state with a high degree of structural variety.
About CoN
CoN is a metallic compound composed of cobalt and nitrogen. As a transition metal nitride, it exhibits conductive electronic behavior, distinguishing it from insulating ceramic nitrides. Its structural complexity is highlighted by a high volume of reported configurations across various databases.
Due to its position relative to the thermodynamic ground state, this compound is considered metastable. This instability often makes it a subject of interest in synthetic chemistry, where researchers investigate the conditions required to stabilize such phases for specialized material applications.
Key Properties
Cross-validated computational properties for CoN, aggregated across 4 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 CoN. 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 CoN, 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. |
|---|---|---|---|---|---|
| F-43m (No. 216) | cubic | 0.00 | 0.0025 | -0.019 | — |
| — | — | 0.00 | 0.0061 | -0.003 | — |
| — | — | 0.00 | 0.0650 | 0.055 | — |
| F-43m (No. 216) | cubic | 0.00 | 0.1029 | -11.079 | 6.45 |
| — | — | 0.00 | 0.2311 | 0.222 | — |
| — | — | 0.00 | 0.2326 | 0.223 | — |
| — | — | 0.00 | 0.2333 | 0.224 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.3638 | 0.343 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.3742 | -10.807 | 7.53 |
| — | — | 0.00 | 0.4096 | 0.400 | — |
| — | — | 0.00 | 0.4101 | 0.401 | — |
| — | — | 0.00 | 0.4104 | 0.401 | — |
Applications
Where CoN is used.
Frequently Asked Questions
Common questions about CoN, answered from cross-validated data.
What is CoN?
CoN is a metallic cobalt nitride compound that exists in a metastable state with a high degree of structural variety.
What is CoN used for?
What is the band gap of CoN?
Is CoN a metal, semiconductor, or insulator?
Is CoN thermodynamically stable?
What is the crystal structure of CoN?
How many polymorphs of CoN are known?
What elements does CoN contain?
Where does the data for CoN come from?
How It Compares
As a standalone entry in this context, CoN represents a specific point in the cobalt-nitrogen phase space, serving as a reference for understanding the structural diversity of transition metal nitrides that exist above the thermodynamic hull.
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)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- 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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