Cs2S
Cesium sulfide · Dicesium sulfide
Cesium sulfide is an inorganic salt composed of cesium and sulfur. It is primarily utilized as a chemical reagent in specialized laboratory research and as a precursor for the synthesis of other cesium-containing compounds.
Key Properties
Cross-validated computational properties for Cesium sulfide, aggregated across 2 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 Cs2S, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 2.10 | 0.0000 | -20.609 | 4.03 |
| P63/mmc (No. 194) | hexagonal | 2.08 | 0.0667 | -20.543 | 4.06 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.04 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.37 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.78 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.29 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.74 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.47 |
| C2/m (No. 12) | Monoclinic | — | — | — | 1.80 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 2.28 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 2.66 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.14 |
Applications
Where Cesium sulfide is used.
Frequently Asked Questions
Common questions about Cesium sulfide, answered from cross-validated data.
What is Cs2S?
Cesium sulfide is an inorganic salt composed of cesium and sulfur. It is primarily utilized as a chemical reagent in specialized laboratory research and as a precursor for the synthesis of other cesium-containing compounds.
What is Cs2S used for?
What is the band gap of Cs2S?
Is Cs2S a metal, semiconductor, or insulator?
Is Cs2S thermodynamically stable?
What is the crystal structure of Cs2S?
What is the density of Cs2S?
How many polymorphs of Cs2S are known?
What elements does Cs2S contain?
Where does the data for Cs2S come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
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