Sr2WO5
Sr2WO5 is a wide-band-gap insulating oxide that is theoretically predicted to be stable enough for laboratory synthesis.
About Sr2WO5
Sr2WO5 is an insulating oxide composed of strontium, tungsten, and oxygen. As a wide-band-gap material, it exhibits electronic properties typical of stable dielectric oxides, which are essential for applications requiring robust electrical insulation and chemical stability.
Because it sits near the thermodynamic hull, Sr2WO5 is considered a likely synthesizable phase. Its structural diversity, evidenced by multiple reported configurations, suggests a flexible lattice that can be tuned for specific functional requirements in solid-state devices.
Key Properties
Cross-validated computational properties for Sr2WO5, 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 Sr2WO5, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 3.19 | 0.0108 | -8.035 | 6.63 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 6.34 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 6.92 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 6.51 |
| No. 0 | unknown | — | — | — | 1.02 |
| No. 0 | unknown | — | — | — | 1.02 |
Applications
Where Sr2WO5 is used.
Frequently Asked Questions
Common questions about Sr2WO5, answered from cross-validated data.
What is Sr2WO5?
Sr2WO5 is a wide-band-gap insulating oxide that is theoretically predicted to be stable enough for laboratory synthesis.
What is Sr2WO5 used for?
What is the band gap of Sr2WO5?
Is Sr2WO5 a metal, semiconductor, or insulator?
Is Sr2WO5 thermodynamically stable?
What is the crystal structure of Sr2WO5?
What is the density of Sr2WO5?
How many polymorphs of Sr2WO5 are known?
What elements does Sr2WO5 contain?
Where does the data for Sr2WO5 come from?
How It Compares
As a unique member of the strontium-tungsten-oxygen system, Sr2WO5 occupies a distinct structural space that distinguishes it from more common binary or simple ternary oxides. Its status as a near-hull phase highlights its potential as a stable, functional material for future experimental investigation.
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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