Si2O3
Silicon sesquioxide
Silicon sesquioxide is a suboxide of silicon that exists as an amorphous solid. It is primarily studied for its potential role in advanced thin-film electronics and as a precursor material in the fabrication of silicon-based nanostructures.
Key Properties
Cross-validated computational properties for Si2O3, 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 Si2O3, 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. |
|---|---|---|---|---|---|
| C2/c (No. 15) | monoclinic | 0.99 | 0.7802 | -7.304 | 1.74 |
| No. 0 | unknown | — | — | — | 0.36 |
| No. 0 | unknown | — | — | — | 0.38 |
| No. 0 | unknown | — | — | — | 0.38 |
| No. 0 | unknown | — | — | — | 0.61 |
| No. 0 | unknown | — | — | — | 2.79 |
| No. 0 | unknown | — | — | — | 1.24 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 4.55 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 3.35 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 3.78 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.40 |
| P1 (No. 1) | Triclinic | — | — | — | 2.44 |
Applications
Where Si2O3 is used.
Frequently Asked Questions
Common questions about Si2O3, answered from cross-validated data.
What is Si2O3?
Silicon sesquioxide is a suboxide of silicon that exists as an amorphous solid. It is primarily studied for its potential role in advanced thin-film electronics and as a precursor material in the fabrication of silicon-based nanostructures.
What is Si2O3 used for?
What is the band gap of Si2O3?
Is Si2O3 a metal, semiconductor, or insulator?
Is Si2O3 thermodynamically stable?
What is the crystal structure of Si2O3?
What is the density of Si2O3?
How many polymorphs of Si2O3 are known?
What elements does Si2O3 contain?
Where does the data for Si2O3 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- mpaloe — Data from mpaloe.
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