Na5Mn7O16
Na5Mn7O16 is a metastable, semiconducting layered oxide of sodium and manganese used in energy storage research.
About Na5Mn7O16
Na5Mn7O16 is a complex layered sodium transition-metal oxide characterized by its semiconducting electronic nature. As a metastable phase, it represents a unique structural arrangement within the manganese-based oxide family, offering distinct pathways for ion transport and structural flexibility.
This material is primarily investigated for its potential in advanced electrochemical energy storage systems. Its specific stoichiometry and layered architecture make it a subject of interest for researchers looking to optimize electrode performance in next-generation sodium-ion battery technologies.
Key Properties
Cross-validated computational properties for Na5Mn7O16, 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 Na5Mn7O16, 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. |
|---|---|---|---|---|---|
| P2/m (No. 10) | monoclinic | 0.61 | 0.0388 | -7.269 | 3.84 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0970 | -7.210 | 3.81 |
| C2/m (No. 12) | Monoclinic | — | — | — | 3.81 |
| C2/m (No. 12) | Monoclinic | — | — | — | 4.19 |
| P2/m (No. 10) | Monoclinic | — | — | — | 4.02 |
| P2/m (No. 10) | Monoclinic | — | — | — | 4.21 |
| P2/m (No. 10) | Monoclinic | — | — | — | 3.84 |
| C2/m (No. 12) | Monoclinic | — | — | — | 4.00 |
| P2/m (No. 10) | — | — | — | — | — |
Applications
Where Na5Mn7O16 is used.
Frequently Asked Questions
Common questions about Na5Mn7O16, answered from cross-validated data.
What is Na5Mn7O16?
Na5Mn7O16 is a metastable, semiconducting layered oxide of sodium and manganese used in energy storage research.
What is Na5Mn7O16 used for?
What is the band gap of Na5Mn7O16?
Is Na5Mn7O16 a metal, semiconductor, or insulator?
Is Na5Mn7O16 thermodynamically stable?
What is the crystal structure of Na5Mn7O16?
What is the density of Na5Mn7O16?
How many polymorphs of Na5Mn7O16 are known?
What elements does Na5Mn7O16 contain?
Where does the data for Na5Mn7O16 come from?
How It Compares
Within the layered sodium transition-metal oxides class.
Within the broader family of layered sodium transition-metal oxides, Na5Mn7O16 occupies a specialized niche compared to more common, highly stable phases like NaCoO2 or NaFeO2. While many siblings in this class are studied for their robust cycling capabilities, this manganese-rich oxide is distinguished by its metastable nature, which provides a different structural framework for studying ion insertion processes compared to the simpler, more conventional layered structures.
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.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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