RbAuO2
RbAuO2 is a stable semiconducting ternary oxide composed of rubidium, gold, and oxygen.
About RbAuO2
RbAuO2 is a ternary oxide containing rubidium and gold that exhibits semiconducting electronic behavior. As a thermodynamically stable phase located on the convex hull, it represents a well-defined structural arrangement within its chemical system.
Its stability and electronic characteristics make it a subject of interest for researchers investigating the interplay between heavy alkali metals and precious metals in oxide frameworks. The compound is documented through multiple structural variations across major materials databases.
Key Properties
Cross-validated computational properties for RbAuO2, 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 RbAuO2. 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 RbAuO2, 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. |
|---|---|---|---|---|---|
| — | — | 1.57 | 0.0000 | -0.991 | — |
| Cmcm (No. 63) | orthorhombic | 1.57 | 0.0000 | -0.913 | — |
| Cmcm (No. 63) | orthorhombic | 1.48 | 0.0000 | -4.674 | 6.03 |
| — | — | 1.20 | 0.0549 | -0.936 | — |
| Cmcm (No. 63) | orthorhombic | — | — | — | 5.65 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 6.03 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 5.80 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 6.25 |
Frequently Asked Questions
Common questions about RbAuO2, answered from cross-validated data.
What is RbAuO2?
RbAuO2 is a stable semiconducting ternary oxide composed of rubidium, gold, and oxygen.
What is the band gap of RbAuO2?
Is RbAuO2 a metal, semiconductor, or insulator?
Is RbAuO2 thermodynamically stable?
What is the crystal structure of RbAuO2?
How many polymorphs of RbAuO2 are known?
What elements does RbAuO2 contain?
Where does the data for RbAuO2 come from?
How It Compares
As a distinct ternary oxide, RbAuO2 serves as a unique reference point for understanding the structural chemistry of rubidium-gold oxides. It occupies a stable position in the chemical landscape, providing a baseline for exploring the electronic and physical properties of complex aurate-based materials.
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.
- 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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