KSb
KSb is a stable semiconducting binary compound formed from potassium and antimony.
About KSb
KSb is a binary inorganic compound that sits firmly on the thermodynamic convex hull, indicating high stability. As a semiconducting material, it represents an interesting subject for researchers investigating the electronic properties of alkali metal antimonides.
With a significant number of reported structures across major databases, this compound is a well-documented subject in solid-state chemistry. Its stability and electronic nature make it a valuable candidate for fundamental studies into the behavior of potassium-antimony systems.
Key Properties
Cross-validated computational properties for KSb, aggregated across 5 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 KSb. 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 KSb, 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. |
|---|---|---|---|---|---|
| — | — | 0.90 | 0.0000 | -0.443 | — |
| P21/c (No. 14) | monoclinic | 0.72 | 0.0000 | -0.510 | — |
| P21/c (No. 14) | monoclinic | 0.66 | 0.0000 | -16.433 | 3.46 |
| — | — | 0.64 | 0.0013 | -0.442 | — |
| — | — | 0.00 | 0.1550 | -0.288 | — |
| — | — | 0.00 | 0.1611 | -0.282 | — |
| — | — | 0.00 | 0.1952 | -0.248 | — |
| — | — | 0.00 | 0.3098 | -0.133 | — |
| — | — | 0.00 | 0.3102 | -0.133 | — |
| — | — | 0.00 | 0.3654 | -0.078 | — |
| — | — | 0.00 | 0.7893 | 0.346 | — |
| — | — | 0.00 | 0.8251 | 0.382 | — |
Applications
Where KSb is used.
Frequently Asked Questions
Common questions about KSb, answered from cross-validated data.
What is KSb?
KSb is a stable semiconducting binary compound formed from potassium and antimony.
What is KSb used for?
What is the band gap of KSb?
Is KSb a metal, semiconductor, or insulator?
Is KSb thermodynamically stable?
What is the crystal structure of KSb?
How many polymorphs of KSb are known?
What elements does KSb contain?
Where does the data for KSb come from?
How It Compares
As a standalone entry in this context, KSb serves as a primary reference point for understanding the structural diversity and thermodynamic viability of potassium-antimony binary phases.
Data sources & attribution
- 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)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- 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.
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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