K3Sb
tripotassium antimonide · potassium antimonide
Tripotassium antimonide is an intermetallic compound that functions as a semiconductor material. It is primarily utilized in the production of photocathodes for sensitive light-detection devices.
KSb
Overview
Key Properties
Cross-validated computational properties for tripotassium antimonide, aggregated across 4 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.
0.39–0.68 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)
3 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
19
4 databases, 5 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for K3Sb, 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. |
|---|---|---|---|---|---|
| P63/mmc (No. 194) | hexagonal | 0.39 | 0.0000 | -11.489 | 2.31 |
| Fm-3m (No. 225) | cubic | 0.68 | 0.0152 | -11.473 | 2.63 |
| Pm-3m (No. 221) | — | — | — | — | — |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 2.24 |
| — | — | — | — | — | 2.56 |
| Pmm2 (No. 25) | Orthorhombic | — | — | — | 2.04 |
| Fm-3m (No. 225) | — | — | — | — | — |
| Pmm2 (No. 25) | Orthorhombic | — | — | — | 2.04 |
| Pmm2 (No. 25) | Orthorhombic | — | — | — | 2.05 |
| P63/mmc (No. 194) | — | — | — | — | — |
| P63/mmc (No. 194) | — | — | — | — | — |
| Cm (No. 8) | Monoclinic | — | — | — | 1.89 |
Uses
Applications
Where tripotassium antimonide is used.
photocathodesphotomultiplier tubesimage intensifiers
Reference
Frequently Asked Questions
Common questions about tripotassium antimonide, answered from cross-validated data.
What is K3Sb?
Tripotassium antimonide is an intermetallic compound that functions as a semiconductor material. It is primarily utilized in the production of photocathodes for sensitive light-detection devices.
More questions
What is K3Sb used for?
tripotassium antimonide (K3Sb) is used in photocathodes, photomultiplier tubes, and image intensifiers.
What is the band gap of K3Sb?
tripotassium antimonide (K3Sb) has a DFT-computed band gap of 0.39–0.68 eV across 19 reported structures.
Is K3Sb a metal, semiconductor, or insulator?
With a band gap up to 0.68 eV it is a semiconductor.
Is K3Sb thermodynamically stable?
Yes — tripotassium antimonide (K3Sb) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of K3Sb?
The lowest-energy reported polymorph of tripotassium antimonide (K3Sb) is hexagonal symmetry, space group P63/mmc (No. 194).
What is the density of K3Sb?
The computed density of the ground-state structure of tripotassium antimonide (K3Sb) is 2.31 g/cm³.
How many polymorphs of K3Sb are known?
19 structures of K3Sb are reported across 4 databases, spanning 5 distinct space groups.
What elements does K3Sb contain?
tripotassium antimonide (K3Sb) contains K and Sb (2 elements).
Where does the data for K3Sb come from?
K3Sb data is cross-referenced from materials_project, jarvis, mpaloe, omat24.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
Analyze K3Sb in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →