Cs2Se3
Cs2Se3 is a stable semiconducting compound formed from cesium and selenium that is frequently studied for its structural complexity.
About Cs2Se3
Cs2Se3 is a distinct inorganic compound composed of cesium and selenium. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural configuration within its chemical system.
The material exhibits semiconducting electronic character, making it a subject of interest for researchers investigating the interplay between alkali metals and chalcogens. Its structural diversity, evidenced by numerous reported configurations, highlights its flexibility in solid-state chemistry.
Key Properties
Cross-validated computational properties for Cs2Se3, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Cs2Se3. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for Cs2Se3, 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. |
|---|---|---|---|---|---|
| Cmc21 (No. 36) | orthorhombic | 0.75 | 0.0000 | -3.559 | 4.26 |
| — | — | — | 0.0000 | -0.840 | — |
| — | — | 0.00 | 0.1691 | -0.671 | — |
| P-1 (No. 2) | triclinic | — | — | — | 1.61 |
| Pm (No. 6) | monoclinic | — | — | — | 3.45 |
| P-1 (No. 2) | triclinic | — | — | — | 1.46 |
| P-1 (No. 2) | triclinic | — | — | — | 2.07 |
| C2 (No. 5) | monoclinic | — | — | — | 3.65 |
| C2 (No. 5) | monoclinic | — | — | — | 3.33 |
| C2 (No. 5) | monoclinic | — | — | — | 3.94 |
| P1 (No. 1) | triclinic | — | — | — | 4.35 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 4.20 |
Applications
Where Cs2Se3 is used.
Frequently Asked Questions
Common questions about Cs2Se3, answered from cross-validated data.
What is Cs2Se3?
Cs2Se3 is a stable semiconducting compound formed from cesium and selenium that is frequently studied for its structural complexity.
What is Cs2Se3 used for?
What is the band gap of Cs2Se3?
Is Cs2Se3 a metal, semiconductor, or insulator?
Is Cs2Se3 thermodynamically stable?
What is the crystal structure of Cs2Se3?
What is the density of Cs2Se3?
How many polymorphs of Cs2Se3 are known?
What elements does Cs2Se3 contain?
Where does the data for Cs2Se3 come from?
How It Compares
As a stable member of the cesium-selenium system, Cs2Se3 serves as a foundational reference point for understanding the stoichiometry and bonding behavior of alkali metal polyselenides.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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