Na4MgMn4O8
Na4MgMn4O8 is a semiconducting layered sodium transition-metal oxide being studied for its potential applications in energy storage technologies.
About Na4MgMn4O8
Na4MgMn4O8 is a complex layered sodium transition-metal oxide that exhibits semiconducting electronic properties. As a member of this diverse class of materials, it is primarily investigated for its potential role in electrochemical energy storage systems where ion mobility and structural stability are critical factors for performance.
Due to its position above the thermodynamic hull, this compound is considered metastable, which presents unique challenges and opportunities for synthesis and structural characterization. Its complex arrangement of magnesium and manganese cations within the oxide lattice makes it a subject of interest for researchers mapping the phase space of sodium-based electrode materials.
Key Properties
Cross-validated computational properties for Na4MgMn4O8, 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.
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 Na4MgMn4O8, 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. |
|---|---|---|---|---|---|
| Pm (No. 6) | monoclinic | 0.00 | 0.1236 | -6.823 | 3.53 |
| P1 (No. 1) | triclinic | 0.00 | 0.1331 | -6.813 | 3.42 |
| Pm (No. 6) | monoclinic | 0.00 | 0.1459 | -6.800 | 3.43 |
| P1 (No. 1) | triclinic | 0.85 | 0.1587 | -6.788 | 3.36 |
| Pm (No. 6) | monoclinic | 0.00 | 0.1593 | -6.787 | 3.43 |
| C2 (No. 5) | monoclinic | 0.64 | 0.1707 | -6.776 | 3.42 |
| I-4m2 (No. 119) | tetragonal | 0.00 | 0.1717 | -6.775 | 3.59 |
| P1 (No. 1) | Triclinic | — | — | — | 3.60 |
| Pm (No. 6) | Monoclinic | — | — | — | 3.43 |
| P1 (No. 1) | Triclinic | — | — | — | 3.69 |
| P1 (No. 1) | Triclinic | — | — | — | 3.42 |
| Pm (No. 6) | Monoclinic | — | — | — | 3.59 |
Applications
Where Na4MgMn4O8 is used.
Frequently Asked Questions
Common questions about Na4MgMn4O8, answered from cross-validated data.
What is Na4MgMn4O8?
Na4MgMn4O8 is a semiconducting layered sodium transition-metal oxide being studied for its potential applications in energy storage technologies.
What is Na4MgMn4O8 used for?
What is the band gap of Na4MgMn4O8?
Is Na4MgMn4O8 a metal, semiconductor, or insulator?
Is Na4MgMn4O8 thermodynamically stable?
What is the crystal structure of Na4MgMn4O8?
What is the density of Na4MgMn4O8?
How many polymorphs of Na4MgMn4O8 are known?
What elements does Na4MgMn4O8 contain?
Where does the data for Na4MgMn4O8 come from?
How It Compares
Within the layered sodium transition-metal oxides class.
Within the broad family of layered sodium transition-metal oxides, Na4MgMn4O8 occupies a distinct niche compared to more common, stable members like NaCoO2 or NaMnO2. While those materials often serve as benchmarks for commercial battery cathodes due to their structural robustness, Na4MgMn4O8 represents a more exotic, metastable composition that requires precise synthetic control to stabilize its layered framework.
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).
- mpaloe — Data from mpaloe.
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