SiO4
SiO4 is a semiconducting silicon-oxygen compound that is characterized by its thermodynamic instability and significant structural variety.
About SiO4
SiO4 is a silicon-oxygen compound that exhibits semiconducting electronic behavior. Due to its position above the thermodynamic hull, it is considered an unstable phase that typically requires specific conditions to exist in a laboratory setting.
Despite its instability, the compound is notable for its structural diversity, appearing in a wide variety of reported configurations. It serves as a subject of interest for researchers investigating the complex phase space of silicon-based oxides.
Key Properties
Cross-validated computational properties for SiO4, 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 SiO4, 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. |
|---|---|---|---|---|---|
| P1 (No. 1) | triclinic | 0.39 | 0.8029 | -6.204 | 1.98 |
| P1 (No. 1) | triclinic | 0.15 | 1.4433 | -5.564 | 1.98 |
| P1 (No. 1) | triclinic | 0.00 | 2.3392 | -4.668 | 2.04 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.59 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.89 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.12 |
| P1 (No. 1) | Triclinic | — | — | — | 3.24 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 2.63 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 2.99 |
| P4mm (No. 99) | Tetragonal | — | — | — | 4.25 |
| P4mm (No. 99) | Tetragonal | — | — | — | 3.03 |
| P4mm (No. 99) | Tetragonal | — | — | — | 3.43 |
Applications
Where SiO4 is used.
Frequently Asked Questions
Common questions about SiO4, answered from cross-validated data.
What is SiO4?
SiO4 is a semiconducting silicon-oxygen compound that is characterized by its thermodynamic instability and significant structural variety.
What is SiO4 used for?
What is the band gap of SiO4?
Is SiO4 a metal, semiconductor, or insulator?
Is SiO4 thermodynamically stable?
What is the crystal structure of SiO4?
What is the density of SiO4?
How many polymorphs of SiO4 are known?
What elements does SiO4 contain?
Where does the data for SiO4 come from?
How It Compares
As a unique silicon-oxygen arrangement, SiO4 occupies a distinct niche in materials science, serving as a model for understanding the structural complexity and metastability inherent in simple binary oxides.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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