KSO4
KSO4 is a metastable, wide-band-gap insulating material that exists in various structural forms.
About KSO4
KSO4 is an insulating compound characterized by a wide electronic band gap. As a metastable material, it represents a unique structural configuration that challenges conventional thermodynamic stability expectations within its chemical system.
Its existence across multiple structural databases highlights its significance as a subject of ongoing crystallographic study. Researchers investigate this compound to better understand the phase behavior and structural diversity of potassium-sulfur-oxygen systems.
Key Properties
Cross-validated computational properties for KSO4, 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.
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 KSO4, 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. |
|---|---|---|---|---|---|
| Pbca (No. 61) | orthorhombic | 0.00 | 0.0986 | -6.017 | 2.13 |
| P-1 (No. 2) | triclinic | 3.52 | 0.1475 | -5.968 | 2.27 |
| P-1 (No. 2) | triclinic | 3.56 | 0.1576 | -5.958 | 2.26 |
| P-1 (No. 2) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 0.29 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.26 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.30 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.40 |
| C2/c (No. 15) | monoclinic | — | — | — | 0.34 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.39 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.27 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.30 |
Frequently Asked Questions
Common questions about KSO4, answered from cross-validated data.
What is KSO4?
KSO4 is a metastable, wide-band-gap insulating material that exists in various structural forms.
What is the band gap of KSO4?
Is KSO4 a metal, semiconductor, or insulator?
Is KSO4 thermodynamically stable?
What is the crystal structure of KSO4?
What is the density of KSO4?
How many polymorphs of KSO4 are known?
What elements does KSO4 contain?
Where does the data for KSO4 come from?
How It Compares
As a standalone entry in this context, KSO4 serves as a primary example of metastable insulating phases within its chemical family. Its structural complexity and the variety of reported configurations position it as a critical reference point for future studies into the stability of similar ternary oxides.
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).
- 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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