Na5CoO4
This compound is a sodium cobalt oxide material characterized by its specific stoichiometry of alkali metal and transition metal components. It is primarily studied in the field of solid-state chemistry as a precursor or intermediate phase in the synthesis of various cobalt-based battery electrode materials.
Key Properties
Cross-validated computational properties for Na5CoO4, 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 Na5CoO4, 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. |
|---|---|---|---|---|---|
| Pbca (No. 61) | orthorhombic | 1.46 | 0.0001 | -4.885 | 2.95 |
| Pbca (No. 61) | orthorhombic | 1.53 | 0.0138 | -4.871 | 2.73 |
| Pmn21 (No. 31) | orthorhombic | 1.66 | 0.0443 | -4.841 | 2.86 |
| Pmn21 (No. 31) | — | — | — | — | — |
| Pmn21 (No. 31) | Orthorhombic | — | — | — | 2.86 |
| Pmn21 (No. 31) | Orthorhombic | — | — | — | 2.97 |
| Pmn21 (No. 31) | Orthorhombic | — | — | — | 2.97 |
Applications
Where Na5CoO4 is used.
Frequently Asked Questions
Common questions about Na5CoO4, answered from cross-validated data.
What is Na5CoO4?
This compound is a sodium cobalt oxide material characterized by its specific stoichiometry of alkali metal and transition metal components. It is primarily studied in the field of solid-state chemistry as a precursor or intermediate phase in the synthesis of various cobalt-based battery electrode materials.
What is Na5CoO4 used for?
What is the band gap of Na5CoO4?
Is Na5CoO4 a metal, semiconductor, or insulator?
Is Na5CoO4 thermodynamically stable?
What is the crystal structure of Na5CoO4?
What is the density of Na5CoO4?
How many polymorphs of Na5CoO4 are known?
What elements does Na5CoO4 contain?
Where does the data for Na5CoO4 come from?
Related Compounds
Other Layered Sodium Transition-Metal Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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