Cd1K2Pb1
Cd1K2Pb1 has a DFT band gap of 0.16 eV across 28 reported structures in 20 space groups; its lowest-energy polymorph is orthorhombic (Cmcm (No. 63)). Cross-validated across 3 computational databases.
Overview
Key Properties
Cross-validated computational properties for Cd1K2Pb1, 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.
0.16 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
28
3 databases, 20 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Cd1K2Pb1, 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 | 0.16 | 0.0000 | -22.377 | 4.24 |
| Ama2 (No. 40) | orthorhombic | 0.00 | 0.0000 | -1.892 | 4.07 |
| Cmmm (No. 65) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Immm (No. 71) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
Reference
Frequently Asked Questions
Common questions about Cd1K2Pb1, answered from cross-validated data.
What is the band gap of Cd1K2Pb1?
Cd1K2Pb1 has a DFT-computed band gap of 0.16 eV across 28 reported structures.
More questions
Is Cd1K2Pb1 a metal, semiconductor, or insulator?
With a band gap up to 0.16 eV it is a semiconductor.
Is Cd1K2Pb1 thermodynamically stable?
Yes — Cd1K2Pb1 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Cd1K2Pb1?
The lowest-energy reported polymorph of Cd1K2Pb1 is orthorhombic symmetry, space group Cmcm (No. 63).
What is the density of Cd1K2Pb1?
The computed density of the ground-state structure of Cd1K2Pb1 is 4.24 g/cm³.
How many polymorphs of Cd1K2Pb1 are known?
28 structures of Cd1K2Pb1 are reported across 3 databases, spanning 20 distinct space groups.
What elements does Cd1K2Pb1 contain?
Cd1K2Pb1 contains Cd, K, and Pb (3 elements).
Where does the data for Cd1K2Pb1 come from?
Cd1K2Pb1 data is cross-referenced from materials_project, aflow.
Explore
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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