Co2K12Se8
Co2K12Se8 is a semiconducting cobalt potassium selenide that is theoretically stable enough to be synthesized for materials research.
About Co2K12Se8
Co2K12Se8 is a complex ternary selenide composed of cobalt, potassium, and selenium. As a semiconducting material, it represents a unique structural arrangement within its chemical family that warrants further investigation for its electronic properties.
Because it sits near the thermodynamic hull, this compound is considered a promising candidate for experimental synthesis. Its existence across multiple structural databases highlights its significance as a stable or metastable phase in the cobalt-potassium-selenium system.
Key Properties
Cross-validated computational properties for Co2K12Se8, 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 Co2K12Se8, 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. |
|---|---|---|---|---|---|
| P63mc (No. 186) | hexagonal | 0.43 | 0.0203 | -3.624 | 2.79 |
| — | — | — | — | — | 2.00 |
| P63mc (No. 186) | — | — | — | — | — |
| P63mc (No. 186) | — | — | — | — | — |
Applications
Where Co2K12Se8 is used.
Frequently Asked Questions
Common questions about Co2K12Se8, answered from cross-validated data.
What is Co2K12Se8?
Co2K12Se8 is a semiconducting cobalt potassium selenide that is theoretically stable enough to be synthesized for materials research.
What is Co2K12Se8 used for?
What is the band gap of Co2K12Se8?
Is Co2K12Se8 a metal, semiconductor, or insulator?
Is Co2K12Se8 thermodynamically stable?
What is the crystal structure of Co2K12Se8?
What is the density of Co2K12Se8?
How many polymorphs of Co2K12Se8 are known?
What elements does Co2K12Se8 contain?
Where does the data for Co2K12Se8 come from?
How It Compares
As a distinct ternary phase, Co2K12Se8 occupies a specialized niche in materials science. Without direct structural siblings in this specific class, it serves as a primary reference point for understanding how cobalt and potassium interact within a selenium-rich framework to produce semiconducting behavior.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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