Na12O4S12V4
Na12O4S12V4 has a DFT band gap of 1.77–2.02 eV across 3 reported structures in 2 space groups; its lowest-energy polymorph is orthorhombic (Cmc21 (No. 36)). Cross-validated across 2 computational databases.
At a glance
Key Properties
Cross-validated computational properties for Na12O4S12V4, aggregated across 2 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.
1.77–2.02 eV
Range across DFT structures
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.
0.110 eV/atom
Best (lowest) across sources
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.
Above hull
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
3
2 databases, 2 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Na12O4S12V4, 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. |
|---|---|---|---|---|---|
| Cmc21 (No. 36) | orthorhombic | 2.02 | 0.1104 | -5.233 | 2.20 |
| Pnma (No. 62) | orthorhombic | 1.77 | 0.1106 | -5.233 | 2.20 |
| Pnma (No. 62) | — | — | — | — | — |
Reference
Frequently Asked Questions
Common questions about Na12O4S12V4, answered from cross-validated data.
What is the band gap of Na12O4S12V4?
Na12O4S12V4 has a DFT-computed band gap of 1.77–2.02 eV across 3 reported structures.
More questions
Is Na12O4S12V4 a metal, semiconductor, or insulator?
With a band gap up to 2.02 eV it is a semiconductor.
Is Na12O4S12V4 thermodynamically stable?
Na12O4S12V4 has a lowest energy above hull of 0.110 eV/atom (above hull).
What is the crystal structure of Na12O4S12V4?
The lowest-energy reported polymorph of Na12O4S12V4 is orthorhombic symmetry, space group Cmc21 (No. 36).
What is the density of Na12O4S12V4?
The computed density of the ground-state structure of Na12O4S12V4 is 2.20 g/cm³.
How many polymorphs of Na12O4S12V4 are known?
3 structures of Na12O4S12V4 are reported across 2 databases, spanning 2 distinct space groups.
What elements does Na12O4S12V4 contain?
Na12O4S12V4 contains Na, O, S, and V (4 elements).
Where does the data for Na12O4S12V4 come from?
Na12O4S12V4 data is cross-referenced from materials_project, aflow.
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Related Compounds
Other Polyanion Sulfate Cathodes in the database.
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).
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