V3As2O9
V3As2O9 is a metastable semiconducting oxide composed of vanadium, arsenic, and oxygen.
About V3As2O9
V3As2O9 is a complex oxide containing vanadium and arsenic. As a metastable phase, it represents a specific structural arrangement that offers unique insights into the synthesis of transition metal arsenates.
Its electronic character as a semiconductor suggests potential utility in specialized electronic or sensing applications. The compound is part of a growing body of research into vanadium-based oxides that exhibit diverse structural motifs.
Key Properties
Cross-validated computational properties for V3As2O9, 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 V3As2O9, 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. |
|---|---|---|---|---|---|
| Cm (No. 8) | monoclinic | 1.27 | 0.0476 | -7.949 | 4.35 |
| P4bm (No. 100) | tetragonal | 2.64 | 0.0571 | -7.940 | 3.77 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.08 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.51 |
| P4bm (No. 100) | Tetragonal | — | — | — | 3.86 |
| P4bm (No. 100) | Tetragonal | — | — | — | 4.14 |
| P4bm (No. 100) | Tetragonal | — | — | — | 3.77 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.23 |
| P4bm (No. 100) | — | — | — | — | — |
Applications
Where V3As2O9 is used.
Frequently Asked Questions
Common questions about V3As2O9, answered from cross-validated data.
What is V3As2O9?
V3As2O9 is a metastable semiconducting oxide composed of vanadium, arsenic, and oxygen.
What is V3As2O9 used for?
What is the band gap of V3As2O9?
Is V3As2O9 a metal, semiconductor, or insulator?
Is V3As2O9 thermodynamically stable?
What is the crystal structure of V3As2O9?
What is the density of V3As2O9?
How many polymorphs of V3As2O9 are known?
What elements does V3As2O9 contain?
Where does the data for V3As2O9 come from?
How It Compares
As a member of the broader family of vanadium arsenate oxides, V3As2O9 occupies a distinct niche due to its metastable nature. While many related oxides are synthesized under equilibrium conditions, this compound highlights the structural diversity achievable through precise synthetic control within the vanadium-arsenic-oxygen system.
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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