Cs2Te
Cs2Te is a stable semiconducting binary compound formed from cesium and tellurium.
About Cs2Te
Cs2Te is a binary compound composed of cesium and tellurium that exhibits semiconducting electronic characteristics. As a thermodynamically stable phase located on the convex hull, it represents a robust material configuration within its chemical system.
Its structural reliability is supported by a significant body of reported data, making it a subject of interest for researchers investigating specialized electronic materials. The compound's fundamental properties are defined by the interaction between the highly electropositive cesium and the chalcogen tellurium.
Key Properties
Cross-validated computational properties for Cs2Te, 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.
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 Cs2Te. 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 Cs2Te, 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. |
|---|---|---|---|---|---|
| — | — | 1.91 | 0.0000 | -1.036 | — |
| Pnma (No. 62) | orthorhombic | 1.78 | 0.0000 | -2.777 | 4.08 |
| — | — | 1.96 | 0.0006 | -1.036 | — |
| — | — | 1.90 | 0.0165 | -1.020 | — |
| — | — | 1.89 | 0.0168 | -1.019 | — |
| — | — | 1.89 | 0.0169 | -1.019 | — |
| — | — | 1.80 | 0.0484 | -0.988 | — |
| — | — | 1.97 | 0.0677 | -0.969 | — |
| — | — | 1.68 | 0.0686 | -0.968 | — |
| — | — | 1.26 | 0.3136 | -0.723 | — |
| — | — | 0.00 | 0.7104 | -0.326 | — |
| P-1 (No. 2) | triclinic | — | — | — | 3.17 |
Frequently Asked Questions
Common questions about Cs2Te, answered from cross-validated data.
What is Cs2Te?
Cs2Te is a stable semiconducting binary compound formed from cesium and tellurium.
What is the band gap of Cs2Te?
Is Cs2Te a metal, semiconductor, or insulator?
Is Cs2Te thermodynamically stable?
What is the crystal structure of Cs2Te?
What is the density of Cs2Te?
How many polymorphs of Cs2Te are known?
What elements does Cs2Te contain?
Where does the data for Cs2Te come from?
How It Compares
As a standalone binary phase in this context, Cs2Te serves as a primary reference point for investigating the electronic and structural behavior of cesium-telluride systems, demonstrating the stability achievable in alkali-chalcogenide combinations.
Data sources & attribution
- 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)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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