RbPb
RbPb is a stable semiconducting compound formed by the combination of rubidium and lead.
About RbPb
RbPb is a binary intermetallic compound formed from rubidium and lead. As a thermodynamically stable phase residing on the convex hull, it maintains structural integrity under standard conditions.
This material exhibits semiconducting electronic properties, making it a subject of interest for fundamental solid-state research. With numerous documented structural variations across databases, it serves as a key reference point for understanding alkali-metal plumbide behavior.
Key Properties
Cross-validated computational properties for RbPb, 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 RbPb. 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 RbPb, 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. |
|---|---|---|---|---|---|
| — | — | 0.60 | 0.0000 | -0.227 | — |
| I41/acd (No. 142) | tetragonal | 0.41 | 0.0000 | -2.564 | 5.48 |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.0753 | 0.003 | — |
| — | — | 0.00 | 0.3340 | 0.107 | — |
| — | — | 0.00 | 0.3390 | 0.112 | — |
| — | — | 0.00 | 0.3477 | 0.121 | — |
| — | — | 0.00 | 0.4504 | 0.224 | — |
| — | — | 0.00 | 0.7055 | 0.479 | — |
| — | — | 0.00 | 1.0176 | 0.791 | — |
| P21/m (No. 11) | monoclinic | — | — | — | 6.45 |
| P1 (No. 1) | triclinic | — | — | — | 4.85 |
| Cm (No. 8) | monoclinic | — | — | — | 5.00 |
Applications
Where RbPb is used.
Frequently Asked Questions
Common questions about RbPb, answered from cross-validated data.
What is RbPb?
RbPb is a stable semiconducting compound formed by the combination of rubidium and lead.
What is RbPb used for?
What is the band gap of RbPb?
Is RbPb a metal, semiconductor, or insulator?
Is RbPb thermodynamically stable?
What is the crystal structure of RbPb?
What is the density of RbPb?
How many polymorphs of RbPb are known?
What elements does RbPb contain?
Where does the data for RbPb come from?
How It Compares
As a stable binary phase, RbPb represents a well-defined structural arrangement within the broader field of alkali-metal plumbides, serving as a primary example of how these elements combine to form consistent, predictable semiconducting architectures.
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.
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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