RbCl
Rubidium chloride
Rubidium chloride is a stable, insulating salt widely utilized in scientific research and chemical synthesis.
About Rubidium chloride
Rubidium chloride is a thermodynamically stable inorganic salt that exists as a wide-gap insulator. Its robust electronic structure makes it a foundational material for understanding alkali halide behavior in solid-state physics.
Due to its high level of data richness, this compound serves as a primary reference point in structural databases. It is frequently utilized in specialized laboratory settings and as a precursor in the synthesis of other rubidium-containing compounds.
Key Properties
Cross-validated computational properties for Rubidium chloride, 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 RbCl. 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 RbCl, 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. |
|---|---|---|---|---|---|
| — | — | 4.98 | 0.0000 | -2.132 | — |
| Fm-3m (No. 225) | cubic | 4.86 | 0.0000 | -2.091 | — |
| Fm-3m (No. 225) | cubic | 4.84 | 0.0000 | -3.659 | 2.77 |
| — | — | 5.08 | 0.0011 | -2.131 | — |
| — | — | 5.09 | 0.0015 | -2.130 | — |
| — | — | 5.12 | 0.0017 | -2.130 | — |
| Fm-3m (No. 225) | cubic | 5.08 | 0.0190 | -2.072 | — |
| Pm-3m (No. 221) | cubic | 5.34 | 0.0233 | -2.068 | — |
| — | — | 5.08 | 0.0290 | -2.103 | — |
| Pm-3m (No. 221) | cubic | 4.78 | 0.0298 | -3.630 | 3.29 |
| P-6m2 (No. 187) | hexagonal | 4.58 | 0.0435 | -2.048 | — |
| — | — | 4.71 | 0.0471 | -2.085 | — |
Applications
Where Rubidium chloride is used.
Frequently Asked Questions
Common questions about Rubidium chloride, answered from cross-validated data.
What is RbCl?
Rubidium chloride is a stable, insulating salt widely utilized in scientific research and chemical synthesis.
What is RbCl used for?
What is the band gap of RbCl?
Is RbCl a metal, semiconductor, or insulator?
Is RbCl thermodynamically stable?
What is the crystal structure of RbCl?
How many polymorphs of RbCl are known?
What elements does RbCl contain?
Where does the data for RbCl come from?
How It Compares
As a fundamental alkali halide, rubidium chloride serves as a standard model for studying ionic bonding and crystal lattice dynamics, representing a baseline for stability and electronic behavior within its chemical class.
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)
- 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)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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