RbH3O2
RbH3O2 is a thermodynamically stable, insulating compound composed of rubidium, hydrogen, and oxygen.
About RbH3O2
RbH3O2 is a thermodynamically stable compound that sits firmly on the convex hull, indicating a robust structural configuration. As a wide-band-gap insulator, it exhibits electronic properties characteristic of materials that resist electrical conduction under standard conditions. Its existence across multiple structural databases highlights its significance in fundamental materials research.
This compound represents an interesting intersection of alkali metal chemistry and hydrogen-oxygen bonding. Its stability makes it a compelling subject for studies concerning the behavior of hydrogen-rich systems in solid-state environments, where its insulating nature plays a critical role in its overall physical profile.
Key Properties
Cross-validated computational properties for RbH3O2, 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 RbH3O2. 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 RbH3O2, 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. |
|---|---|---|---|---|---|
| — | — | 5.05 | 0.0000 | -1.358 | — |
| Cmc21 (No. 36) | orthorhombic | 4.66 | 0.0000 | -1.270 | — |
| Cmc21 (No. 36) | orthorhombic | 4.26 | 0.0000 | -4.964 | 2.94 |
| — | — | 4.95 | 0.0401 | -1.317 | — |
| — | — | 4.46 | 0.0706 | -1.287 | — |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 2.83 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 2.90 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 2.78 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 2.76 |
Frequently Asked Questions
Common questions about RbH3O2, answered from cross-validated data.
What is RbH3O2?
RbH3O2 is a thermodynamically stable, insulating compound composed of rubidium, hydrogen, and oxygen.
What is the band gap of RbH3O2?
Is RbH3O2 a metal, semiconductor, or insulator?
Is RbH3O2 thermodynamically stable?
What is the crystal structure of RbH3O2?
How many polymorphs of RbH3O2 are known?
What elements does RbH3O2 contain?
Where does the data for RbH3O2 come from?
How It Compares
As a unique entry in this chemical space, RbH3O2 serves as a foundational reference point for understanding the stability and electronic behavior of hydrogen-bearing rubidium compounds, providing a benchmark for future investigations into similar complex hydrides.
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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