KS2Y
This compound is a ternary sulfide containing potassium and yttrium. It is primarily studied in solid-state chemistry research for its structural properties and potential electronic characteristics.
KSY
Overview
Key Properties
Cross-validated computational properties for KS2Y, 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.
2.32 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)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
8
3 databases, 1 space group
Crystallography
Reported Structures
Lowest-energy structures reported for KS2Y, 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. |
|---|---|---|---|---|---|
| R-3m (No. 166) | trigonal | 2.32 | 0.0000 | -12.773 | 3.08 |
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Uses
Applications
Where KS2Y is used.
Solid-state chemistry researchMaterials science investigation
Reference
Frequently Asked Questions
Common questions about KS2Y, answered from cross-validated data.
What is KS2Y?
This compound is a ternary sulfide containing potassium and yttrium. It is primarily studied in solid-state chemistry research for its structural properties and potential electronic characteristics.
More questions
What is KS2Y used for?
KS2Y is used in solid-state chemistry research and materials science investigation.
What is the band gap of KS2Y?
KS2Y has a DFT-computed band gap of 2.32 eV across 8 reported structures.
Is KS2Y a metal, semiconductor, or insulator?
With a band gap up to 2.32 eV it is a semiconductor.
Is KS2Y thermodynamically stable?
Yes — KS2Y sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of KS2Y?
The lowest-energy reported polymorph of KS2Y is trigonal symmetry, space group R-3m (No. 166).
What is the density of KS2Y?
The computed density of the ground-state structure of KS2Y is 3.08 g/cm³.
How many polymorphs of KS2Y are known?
8 structures of KS2Y are reported across 3 databases, spanning 1 distinct space group.
What elements does KS2Y contain?
KS2Y contains K, S, and Y (3 elements).
Where does the data for KS2Y come from?
KS2Y data is cross-referenced from materials_project, alexandria, omat24.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- alexandria — Data from alexandria.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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