KPb2Cl5
KPb2Cl5 is a thermodynamically stable, wide-gap insulating halide compound used in specialized optical and materials research applications.
About KPb2Cl5
KPb2Cl5 is a thermodynamically stable inorganic halide that exists securely on the convex hull. Its electronic character is defined by a wide-gap insulating nature, which distinguishes it from the more conductive or semiconducting members of the halide perovskite family often utilized in light harvesting. This compound is primarily valued for its structural robustness and potential utility in specialized optical applications where insulating properties are required. Its presence in structural databases highlights its well-defined crystalline arrangement and chemical reliability for materials research. The material serves as a stable host or component in systems where chemical durability is prioritized over high charge-carrier mobility. By maintaining a stable configuration, it provides a reliable foundation for exploring the intersection of halide chemistry and insulating material science.
Key Properties
Cross-validated computational properties for KPb2Cl5, 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 KPb2Cl5, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 3.66 | 0.0000 | -20.213 | 4.70 |
| Pna21 (No. 33) | orthorhombic | 3.38 | 0.0128 | -20.200 | 4.68 |
| No. 0 | unknown | — | — | — | 1.19 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.49 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.64 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.65 |
Synthesis Routes
Literature-extracted synthesis procedures targeting KPb2Cl5.
Applications
Where KPb2Cl5 is used.
Frequently Asked Questions
Common questions about KPb2Cl5, answered from cross-validated data.
What is KPb2Cl5?
KPb2Cl5 is a thermodynamically stable, wide-gap insulating halide compound used in specialized optical and materials research applications.
What is KPb2Cl5 used for?
What is the band gap of KPb2Cl5?
Is KPb2Cl5 a metal, semiconductor, or insulator?
Is KPb2Cl5 thermodynamically stable?
What is the crystal structure of KPb2Cl5?
What is the density of KPb2Cl5?
How many polymorphs of KPb2Cl5 are known?
How is KPb2Cl5 synthesized?
What elements does KPb2Cl5 contain?
Where does the data for KPb2Cl5 come from?
How It Compares
Within the halide perovskite photovoltaics class.
Unlike the highly active photovoltaic materials in its class such as CsPbBr3 or CsSnI3, which are characterized by their narrow-gap semiconducting behavior and high optoelectronic sensitivity, KPb2Cl5 functions as a wide-gap insulator. While its siblings are frequently studied for their ability to generate and transport charge carriers in solar cells, KPb2Cl5 occupies a distinct niche where its insulating nature and thermodynamic stability are leveraged for applications requiring dielectric performance rather than active light conversion.
Related Compounds
Other Halide Perovskite Photovoltaics in the database.
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).
- mpaloe — Data from mpaloe.
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