CsO2
Cesium superoxide · Cesium hyperoxide
Cesium superoxide is a stable, semiconducting inorganic compound that serves as an important subject for structural and electronic materials research.

About Cesium superoxide
Cesium superoxide is a distinct inorganic compound characterized by its semiconducting electronic nature. As a member of the superoxide family, it occupies a stable position on the convex hull, indicating significant thermodynamic favorability under standard conditions.
With a high degree of structural diversity documented across multiple databases, this compound serves as a critical subject for fundamental materials science research. Its electronic properties make it a compelling candidate for studies involving charge transport and reactive oxygen species.
Key Properties
Cross-validated computational properties for Cesium superoxide, 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.
Applications
Where Cesium superoxide is used.
Frequently Asked Questions
Common questions about Cesium superoxide, answered from cross-validated data.
What is CsO2?
Cesium superoxide is a stable, semiconducting inorganic compound that serves as an important subject for structural and electronic materials research.
What is CsO2 used for?
What is the band gap of CsO2?
Is CsO2 a metal, semiconductor, or insulator?
Is CsO2 thermodynamically stable?
How many polymorphs of CsO2 are known?
What elements does CsO2 contain?
Where does the data for CsO2 come from?
How It Compares
As a standalone representative of its specific chemical class in this context, cesium superoxide serves as a primary reference point for understanding the behavior of alkali metal superoxides. Its stability and well-characterized structural landscape distinguish it as a robust model for exploring the interplay between ionic bonding and electronic semiconductivity in oxygen-rich inorganic systems.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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