RbIO4
rubidium periodate · rubidium metaperiodate
Rubidium periodate is a stable, semiconducting inorganic salt composed of rubidium, iodine, and oxygen.
About rubidium periodate
Rubidium periodate is a crystalline inorganic compound that exists as a thermodynamically stable phase on the convex hull. Its electronic character is defined as semiconducting, making it an interesting subject for studies involving ionic solids and periodate chemistry.
With multiple reported structures across various databases, this compound is a well-documented material in the field of inorganic chemistry. Its stability and predictable structural behavior allow researchers to utilize it as a benchmark in the study of alkali metal periodates.
Key Properties
Cross-validated computational properties for rubidium periodate, 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 RbIO4. 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 RbIO4, 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. |
|---|---|---|---|---|---|
| I41/a (No. 88) | tetragonal | 2.46 | 0.0000 | -4.886 | 4.05 |
| — | — | 2.49 | 0.0280 | -1.000 | — |
| I41/a (No. 88) | tetragonal | 2.45 | 0.1285 | -0.769 | — |
| I41/a (No. 88) | tetragonal | — | — | — | 4.02 |
| Pm (No. 6) | monoclinic | — | — | — | 3.36 |
| I41/a (No. 88) | tetragonal | — | — | — | — |
| Pm (No. 6) | monoclinic | — | — | — | 3.83 |
| I41/a (No. 88) | tetragonal | — | — | — | 4.02 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.75 |
| Amm2 (No. 38) | orthorhombic | — | — | — | 3.58 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.84 |
Applications
Where rubidium periodate is used.
Frequently Asked Questions
Common questions about rubidium periodate, answered from cross-validated data.
What is RbIO4?
Rubidium periodate is a stable, semiconducting inorganic salt composed of rubidium, iodine, and oxygen.
What is RbIO4 used for?
What is the band gap of RbIO4?
Is RbIO4 a metal, semiconductor, or insulator?
Is RbIO4 thermodynamically stable?
What is the crystal structure of RbIO4?
What is the density of RbIO4?
How many polymorphs of RbIO4 are known?
What elements does RbIO4 contain?
Where does the data for RbIO4 come from?
How It Compares
As a stable member of the periodate family, RbIO4 serves as a foundational example of how alkali metal cations influence the structural arrangement of the periodate anion. It represents a standard reference point for understanding the physical and electronic trends within this specific class of inorganic salts.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- 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)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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