K5Sb4
K5Sb4 is a stable metallic compound consisting of potassium and antimony.
About K5Sb4
K5Sb4 is a binary intermetallic compound formed from potassium and antimony. It is characterized by its metallic electronic nature and is recognized as a thermodynamically stable phase that sits directly on the convex hull of its chemical system.
Due to its stability and well-defined structural profile, this material has been extensively documented in computational databases. Its existence is supported by a significant number of reported structures, making it a reliable subject for research into alkali metal antimonides.
Key Properties
Cross-validated computational properties for K5Sb4, 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.
Reported Structures
Lowest-energy structures reported for K5Sb4, 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. |
|---|---|---|---|---|---|
| C2/m (No. 12) | monoclinic | 0.00 | 0.0000 | -15.344 | 3.15 |
| Cm (No. 8) | monoclinic | 0.00 | 0.0009 | -15.344 | 3.09 |
| P-1 (No. 2) | triclinic | 0.00 | 0.0556 | -15.289 | 3.08 |
| C2/m (No. 12) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| — | — | — | — | — | 3.02 |
| C2/m (No. 12) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 3.04 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.09 |
| C2/m (No. 12) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 2.98 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.04 |
Frequently Asked Questions
Common questions about K5Sb4, answered from cross-validated data.
What is K5Sb4?
K5Sb4 is a stable metallic compound consisting of potassium and antimony.
What is the band gap of K5Sb4?
Is K5Sb4 a metal, semiconductor, or insulator?
Is K5Sb4 thermodynamically stable?
What is the crystal structure of K5Sb4?
What is the density of K5Sb4?
How many polymorphs of K5Sb4 are known?
What elements does K5Sb4 contain?
Where does the data for K5Sb4 come from?
How It Compares
As a stable binary phase, K5Sb4 represents a distinct structural arrangement within the potassium-antimony system, serving as a key reference point for understanding the stoichiometry and bonding behavior of alkali-rich antimonides.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- mpaloe — Data from mpaloe.
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