O20Se8
Selenium pentoxide
This compound is an oxide of selenium that exists as a molecular solid. It is primarily studied in the context of selenium chemistry and serves as a precursor or reagent in specialized synthetic chemical processes.
Key Properties
Cross-validated computational properties for O20Se8, 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 O20Se8, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 2.90 | 0.0000 | -5.555 | 3.61 |
| P21/c (No. 14) | — | — | — | — | — |
| — | — | — | — | — | 3.26 |
Applications
Where O20Se8 is used.
Frequently Asked Questions
Common questions about O20Se8, answered from cross-validated data.
What is O20Se8?
This compound is an oxide of selenium that exists as a molecular solid. It is primarily studied in the context of selenium chemistry and serves as a precursor or reagent in specialized synthetic chemical processes.
What is O20Se8 used for?
What is the band gap of O20Se8?
Is O20Se8 a metal, semiconductor, or insulator?
Is O20Se8 thermodynamically stable?
What is the crystal structure of O20Se8?
What is the density of O20Se8?
How many polymorphs of O20Se8 are known?
What elements does O20Se8 contain?
Where does the data for O20Se8 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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