Si2O5
Si2O5 is a metastable, wide-band-gap insulating oxide of silicon that exhibits significant structural diversity.
About Si2O5
Si2O5 is a silicon-oxygen compound characterized by its insulating electronic nature. As a wide-band-gap material, it represents a complex arrangement of silicon and oxygen atoms that has been the subject of extensive structural investigation across multiple databases. Its presence in numerous reported configurations highlights the structural diversity inherent in silicon-based oxides. Because it resides above the thermodynamic hull, Si2O5 is considered a metastable phase, suggesting that its formation and persistence are highly dependent on specific synthesis conditions. This metastability makes it an intriguing subject for researchers studying the boundaries of silicon oxide stability and the potential for novel structural motifs in high-pressure or non-equilibrium environments.
Key Properties
Cross-validated computational properties for Si2O5, aggregated across 4 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.
Synthesis Routes
Literature-extracted synthesis procedures targeting Si2O5.
Applications
Where Si2O5 is used.
Frequently Asked Questions
Common questions about Si2O5, answered from cross-validated data.
What is Si2O5?
Si2O5 is a metastable, wide-band-gap insulating oxide of silicon that exhibits significant structural diversity.
What is Si2O5 used for?
What is the band gap of Si2O5?
Is Si2O5 a metal, semiconductor, or insulator?
Is Si2O5 thermodynamically stable?
How many polymorphs of Si2O5 are known?
How is Si2O5 synthesized?
What elements does Si2O5 contain?
Where does the data for Si2O5 come from?
How It Compares
As a unique silicon oxide phase, Si2O5 occupies a distinct position within the landscape of silicon-oxygen materials, serving as a case study for metastable structural arrangements that deviate from the more common, thermodynamically favored silica polymorphs.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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