CeS
Cerium monosulfide · Cerium(II) sulfide
Cerium monosulfide is a stable, metallic binary compound of cerium and sulfur used in materials research.
About Cerium monosulfide
Cerium monosulfide is a binary inorganic compound composed of cerium and sulfur. As a metallic phase, it exhibits distinct electronic characteristics that differentiate it from typical insulating rare-earth chalcogenides, making it a subject of interest for fundamental condensed matter studies.
This compound is recognized for its thermodynamic stability, sitting securely on the convex hull. Its structural versatility is highlighted by a significant number of reported configurations across multiple databases, reflecting its importance in material science research and potential high-temperature applications.
Key Properties
Cross-validated computational properties for Cerium monosulfide, aggregated across 5 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 CeS. 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 CeS, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 0.00 | 0.0000 | -2.169 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.0000 | -21.679 | 6.23 |
| — | — | 0.00 | 0.0000 | -2.157 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.0000 | -2.169 | — |
| — | — | 0.00 | 0.0001 | -2.156 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.0226 | -2.147 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.0226 | -2.147 | — |
| — | — | 0.00 | 0.0362 | -2.120 | — |
| — | — | 0.00 | 0.1459 | -2.011 | — |
| — | — | 0.00 | 0.1644 | -1.992 | — |
| — | — | 0.00 | 0.2399 | -1.917 | — |
| — | — | 0.00 | 0.2403 | -1.916 | — |
Applications
Where Cerium monosulfide is used.
Frequently Asked Questions
Common questions about Cerium monosulfide, answered from cross-validated data.
What is CeS?
Cerium monosulfide is a stable, metallic binary compound of cerium and sulfur used in materials research.
What is CeS used for?
What is the band gap of CeS?
Is CeS a metal, semiconductor, or insulator?
Is CeS thermodynamically stable?
What is the crystal structure of CeS?
How many polymorphs of CeS are known?
What elements does CeS contain?
Where does the data for CeS come from?
How It Compares
As a stable metallic sulfide, CeS serves as a primary example of the conductive behavior found within the rare-earth chalcogenide family, providing a baseline for understanding how the inclusion of lanthanide elements influences the electronic landscape of sulfur-based compounds.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- 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.
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