RbIO2
RbIO2 is a metastable, semiconducting compound containing rubidium, iodine, and oxygen that exists in several distinct structural forms.
About RbIO2
RbIO2 is a complex inorganic compound composed of rubidium, iodine, and oxygen. As a semiconducting material, it exhibits electronic properties that distinguish it from simple ionic salts, positioning it as a subject of interest for fundamental solid-state research. The compound is characterized by its metastable nature, as it sits above the thermodynamic hull. Despite this, multiple structural variations have been identified across databases, highlighting the complex coordination chemistry possible within this chemical system.
Key Properties
Cross-validated computational properties for RbIO2, 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.
Reported Structures
Lowest-energy structures reported for RbIO2, 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 | 1.69 | 0.7978 | -3.729 | 3.41 |
| P4mm (No. 99) | — | — | — | — | — |
| C2 (No. 5) | Monoclinic | — | — | — | 3.40 |
| C2 (No. 5) | Monoclinic | — | — | — | 3.45 |
| P1 (No. 1) | Triclinic | — | — | — | 3.27 |
Applications
Where RbIO2 is used.
Frequently Asked Questions
Common questions about RbIO2, answered from cross-validated data.
What is RbIO2?
RbIO2 is a metastable, semiconducting compound containing rubidium, iodine, and oxygen that exists in several distinct structural forms.
What is RbIO2 used for?
What is the band gap of RbIO2?
Is RbIO2 a metal, semiconductor, or insulator?
Is RbIO2 thermodynamically stable?
What is the crystal structure of RbIO2?
What is the density of RbIO2?
How many polymorphs of RbIO2 are known?
What elements does RbIO2 contain?
Where does the data for RbIO2 come from?
How It Compares
As a unique iodate phase, RbIO2 represents a specialized case within the broader family of alkali metal oxo-halides. Unlike more common, highly stable binary salts, this compound demonstrates the structural diversity inherent in systems where the delicate balance of ionic and covalent bonding leads to multiple metastable configurations.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
Analyze RbIO2 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →