RbSn
RbSn is a stable semiconducting intermetallic compound composed of rubidium and tin.
About RbSn
RbSn is a distinct intermetallic compound characterized by its semiconducting electronic nature. As a thermodynamically stable phase located on the convex hull, it represents a robust structural arrangement of rubidium and tin atoms. The material is notable for its significant structural diversity, with numerous reported configurations documented across scientific databases. This structural richness suggests a complex interplay between its constituent elements that warrants further investigation for specialized electronic applications. Its stability makes it a reliable candidate for fundamental studies in solid-state chemistry and materials science.
Key Properties
Cross-validated computational properties for RbSn, 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 RbSn. 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 RbSn, 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. |
|---|---|---|---|---|---|
| — | — | 0.96 | 0.0000 | -0.334 | — |
| I41/acd (No. 142) | tetragonal | 0.74 | 0.0000 | -2.774 | 4.00 |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.0987 | 0.026 | — |
| — | — | 0.00 | 0.4425 | 0.109 | — |
| — | — | 0.00 | 0.4592 | 0.126 | — |
| — | — | 0.00 | 0.4615 | 0.128 | — |
| — | — | 0.00 | 0.4742 | 0.141 | — |
| — | — | 0.00 | 0.8582 | 0.525 | — |
| — | — | 0.00 | 1.1595 | 0.826 | — |
| P-1 (No. 2) | triclinic | — | — | — | 2.87 |
| Cmmm (No. 65) | orthorhombic | — | — | — | 2.49 |
| P1 (No. 1) | triclinic | — | — | — | 1.64 |
Applications
Where RbSn is used.
Frequently Asked Questions
Common questions about RbSn, answered from cross-validated data.
What is RbSn?
RbSn is a stable semiconducting intermetallic compound composed of rubidium and tin.
What is RbSn used for?
What is the band gap of RbSn?
Is RbSn a metal, semiconductor, or insulator?
Is RbSn thermodynamically stable?
What is the crystal structure of RbSn?
What is the density of RbSn?
How many polymorphs of RbSn are known?
What elements does RbSn contain?
Where does the data for RbSn come from?
How It Compares
As a unique intermetallic phase, RbSn occupies a specific niche within the landscape of binary rubidium-tin compounds. Its position on the convex hull distinguishes it as a thermodynamically favored structure, providing a stable baseline for understanding the electronic behavior of alkali metal-post-transition metal systems.
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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