RbSe
RbSe is a stable, semiconducting binary compound formed from rubidium and selenium.
About RbSe
RbSe is a binary inorganic compound composed of rubidium and selenium. It is recognized for its semiconducting electronic character and is noted for being thermodynamically stable on the convex hull, indicating a robust structural configuration.
Due to the significant interest in alkali metal chalcogenides, this material has been extensively characterized in structural databases. Its stability and electronic nature make it a subject of ongoing investigation for fundamental materials science and potential solid-state applications.
Key Properties
Cross-validated computational properties for RbSe, 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 RbSe. 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 RbSe, 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. |
|---|---|---|---|---|---|
| — | — | 1.06 | 0.0000 | -0.941 | — |
| P-62m (No. 189) | hexagonal | 0.92 | 0.0000 | -3.402 | 3.46 |
| P-62m (No. 189) | hexagonal | 0.87 | 0.0000 | -1.014 | — |
| — | — | 0.00 | 0.2419 | -0.699 | — |
| — | — | 0.00 | 0.4000 | -0.541 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.4555 | -0.558 | — |
| — | — | 0.00 | 0.4897 | -0.451 | — |
| — | — | 0.00 | 0.4898 | -0.451 | — |
| Fm-3m (No. 225) | cubic | 0.00 | 0.4932 | -2.909 | 3.09 |
| — | — | 0.00 | 0.4949 | -0.446 | — |
| — | — | 0.00 | 0.5423 | -0.399 | — |
| — | — | 3.34 | 0.7109 | -0.230 | — |
Applications
Where RbSe is used.
Frequently Asked Questions
Common questions about RbSe, answered from cross-validated data.
What is RbSe?
RbSe is a stable, semiconducting binary compound formed from rubidium and selenium.
What is RbSe used for?
What is the band gap of RbSe?
Is RbSe a metal, semiconductor, or insulator?
Is RbSe thermodynamically stable?
What is the crystal structure of RbSe?
How many polymorphs of RbSe are known?
What elements does RbSe contain?
Where does the data for RbSe come from?
How It Compares
As a binary compound within the alkali metal chalcogenide family, RbSe represents a stable structural arrangement that serves as a foundational reference point for understanding the electronic behavior of rubidium-based semiconductors.
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)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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