CuK2P
CuK2P is a stable, semiconducting ternary phosphide compound composed of copper, potassium, and phosphorus.
About CuK2P
CuK2P is a ternary phosphide compound that exists in a thermodynamically stable state on the convex hull. As a semiconducting material, it represents a specialized composition within the broader family of copper-potassium-phosphorus systems, characterized by its distinct electronic behavior.
Its stability makes it an intriguing candidate for fundamental materials research. By occupying a stable position in the phase space, this compound serves as a baseline for understanding how alkali metals and transition metals interact within a phosphorus-rich lattice to influence semiconducting properties.
Key Properties
Cross-validated computational properties for CuK2P, 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 CuK2P. 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 CuK2P, 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. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 1.14 | 0.0000 | -8.398 | 2.75 |
| No. 0 | unknown | — | — | — | 0.51 |
| — | — | — | — | — | 2.73 |
Frequently Asked Questions
Common questions about CuK2P, answered from cross-validated data.
What is CuK2P?
CuK2P is a stable, semiconducting ternary phosphide compound composed of copper, potassium, and phosphorus.
What is the band gap of CuK2P?
Is CuK2P a metal, semiconductor, or insulator?
Is CuK2P thermodynamically stable?
What is the crystal structure of CuK2P?
What is the density of CuK2P?
How many polymorphs of CuK2P are known?
What elements does CuK2P contain?
Where does the data for CuK2P come from?
How It Compares
As a stable ternary phosphide, CuK2P serves as a foundational example of how copper and potassium can be integrated into a phosphorus-based semiconductor framework, providing a reference point for future exploration of similar complex inorganic phases.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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