Rb4In2S5
Rb4In2S5 is a semiconducting rubidium indium sulfide that is theoretically stable enough to be synthesized for material research.
About Rb4In2S5
Rb4In2S5 is a complex sulfide compound containing indium and rubidium. Its semiconducting electronic character makes it an intriguing subject for research into specialized optoelectronic or solid-state devices where tunable conductivity is required.
Because it is positioned near the thermodynamic hull, the compound is considered a viable target for experimental synthesis. Its existence in multiple structural databases underscores its potential as a stable, well-defined inorganic phase for materials science investigations.
Key Properties
Cross-validated computational properties for Rb4In2S5, 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 Rb4In2S5. 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 Rb4In2S5, 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. |
|---|---|---|---|---|---|
| P-1 (No. 2) | triclinic | 2.04 | 0.0000 | -1.135 | — |
| P-1 (No. 2) | triclinic | 2.10 | 0.0040 | -3.969 | 3.42 |
| — | — | 2.16 | 0.0048 | -1.148 | — |
| P-1 (No. 2) | triclinic | — | — | — | 3.41 |
| P-1 (No. 2) | triclinic | — | — | — | 3.39 |
| P-1 (No. 2) | triclinic | — | — | — | 3.31 |
Applications
Where Rb4In2S5 is used.
Frequently Asked Questions
Common questions about Rb4In2S5, answered from cross-validated data.
What is Rb4In2S5?
Rb4In2S5 is a semiconducting rubidium indium sulfide that is theoretically stable enough to be synthesized for material research.
What is Rb4In2S5 used for?
What is the band gap of Rb4In2S5?
Is Rb4In2S5 a metal, semiconductor, or insulator?
Is Rb4In2S5 thermodynamically stable?
What is the crystal structure of Rb4In2S5?
How many polymorphs of Rb4In2S5 are known?
What elements does Rb4In2S5 contain?
Where does the data for Rb4In2S5 come from?
How It Compares
As a distinct indium-based sulfide, Rb4In2S5 serves as a representative example of complex alkali-metal chalcogenides. It occupies a unique niche in the landscape of semiconducting sulfides, offering a specific structural arrangement that distinguishes it from simpler binary or ternary sulfide frameworks.
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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