Na2V2O5
Na2V2O5 is a metastable semiconducting oxide composed of sodium, vanadium, and oxygen.
About Na2V2O5
Na2V2O5 is a complex sodium vanadium oxide that exhibits semiconducting electronic behavior. As a metastable phase, it represents a unique structural configuration within the broader family of vanadium-based oxides, offering distinct pathways for ion transport and electronic interaction.
This compound is primarily of interest in materials research due to its structural versatility, as evidenced by multiple reported crystallographic forms. Its ability to adopt various arrangements makes it a subject of study for researchers investigating tunable electronic properties in transition metal oxides.
Key Properties
Cross-validated computational properties for Na2V2O5, 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 Na2V2O5, 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. |
|---|---|---|---|---|---|
| Cc (No. 9) | monoclinic | 0.83 | 0.0545 | -7.398 | 3.45 |
| Ima2 (No. 46) | orthorhombic | 0.68 | 0.0711 | -7.381 | 3.44 |
| Pbcn (No. 60) | orthorhombic | 0.97 | 0.0869 | -7.365 | 2.52 |
| P21/c (No. 14) | monoclinic | 1.28 | 0.0923 | -7.360 | 2.63 |
| P21/c (No. 14) | monoclinic | 1.17 | 0.0987 | -7.354 | 2.64 |
| Ima2 (No. 46) | Orthorhombic | — | — | — | 3.44 |
| Ima2 (No. 46) | Orthorhombic | — | — | — | 3.76 |
| Ima2 (No. 46) | Orthorhombic | — | — | — | 3.59 |
| Cm (No. 8) | — | — | — | — | — |
Applications
Where Na2V2O5 is used.
Frequently Asked Questions
Common questions about Na2V2O5, answered from cross-validated data.
What is Na2V2O5?
Na2V2O5 is a metastable semiconducting oxide composed of sodium, vanadium, and oxygen.
What is Na2V2O5 used for?
What is the band gap of Na2V2O5?
Is Na2V2O5 a metal, semiconductor, or insulator?
Is Na2V2O5 thermodynamically stable?
What is the crystal structure of Na2V2O5?
What is the density of Na2V2O5?
How many polymorphs of Na2V2O5 are known?
What elements does Na2V2O5 contain?
Where does the data for Na2V2O5 come from?
How It Compares
As a metastable semiconducting oxide, Na2V2O5 serves as a specialized example of sodium-vanadium chemistry. It occupies a niche position where its structural diversity allows for the exploration of non-equilibrium states that are often inaccessible in more stable, naturally occurring vanadium compounds.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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