KIO4
Potassium periodate · Potassium metaperiodate
Potassium periodate is a stable, semiconducting salt frequently utilized as a specialized oxidizing agent in chemical synthesis and analysis.
About Potassium periodate
Potassium periodate is a thermodynamically stable inorganic salt that functions as a semiconducting material. Its robust structural integrity is evidenced by its presence on the convex hull, indicating a highly favorable energetic state compared to its constituent elements.
This compound is widely recognized for its role as a selective oxidizing agent. Its ability to facilitate specific chemical transformations makes it a valuable reagent in laboratory settings, particularly for the oxidative cleavage of organic molecules.
Key Properties
Cross-validated computational properties for Potassium 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 KIO4. 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 KIO4, 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 | 2.35 | 0.0000 | -4.908 | 3.73 |
| — | — | 2.49 | 0.0217 | -1.006 | — |
| I41/a (No. 88) | tetragonal | 2.33 | 0.1173 | -0.776 | — |
| I41/a (No. 88) | tetragonal | — | — | — | 1.83 |
| Amm2 (No. 38) | orthorhombic | — | — | — | 3.50 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.64 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.69 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.45 |
| Cm (No. 8) | monoclinic | — | — | — | 4.84 |
| Amm2 (No. 38) | orthorhombic | — | — | — | 3.19 |
| I41/a (No. 88) | tetragonal | — | — | — | 3.53 |
Applications
Where Potassium periodate is used.
Frequently Asked Questions
Common questions about Potassium periodate, answered from cross-validated data.
What is KIO4?
Potassium periodate is a stable, semiconducting salt frequently utilized as a specialized oxidizing agent in chemical synthesis and analysis.
What is KIO4 used for?
What is the band gap of KIO4?
Is KIO4 a metal, semiconductor, or insulator?
Is KIO4 thermodynamically stable?
What is the crystal structure of KIO4?
What is the density of KIO4?
How many polymorphs of KIO4 are known?
What elements does KIO4 contain?
Where does the data for KIO4 come from?
How It Compares
As a prominent periodate salt, this compound serves as a benchmark for stability and reactivity within its chemical family, providing a reliable source of the periodate anion for various industrial and research-grade oxidative applications.
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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