K4Mn4Na4O8
K4Mn4Na4O8 is a thermodynamically stable, semiconducting layered oxide containing both potassium and sodium, primarily studied for its potential in electrochemical energy storage.
About K4Mn4Na4O8
K4Mn4Na4O8 is a complex layered sodium transition-metal oxide that occupies a stable position on the convex hull. Its semiconducting electronic character makes it an intriguing subject for research into ion-conducting materials and electrode architectures.
As a member of the layered oxide family, this compound is primarily investigated for its potential in electrochemical applications. Its structural stability and specific arrangement of potassium, manganese, and sodium ions provide a unique framework for studying charge transport and structural integrity in battery systems.
Key Properties
Cross-validated computational properties for K4Mn4Na4O8, 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 K4Mn4Na4O8, 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. |
|---|---|---|---|---|---|
| Cccm (No. 66) | orthorhombic | 0.27 | 0.0000 | -5.985 | 3.03 |
| Cccm (No. 66) | — | — | — | — | — |
| — | — | — | — | — | 2.35 |
Applications
Where K4Mn4Na4O8 is used.
Frequently Asked Questions
Common questions about K4Mn4Na4O8, answered from cross-validated data.
What is K4Mn4Na4O8?
K4Mn4Na4O8 is a thermodynamically stable, semiconducting layered oxide containing both potassium and sodium, primarily studied for its potential in electrochemical energy storage.
What is K4Mn4Na4O8 used for?
What is the band gap of K4Mn4Na4O8?
Is K4Mn4Na4O8 a metal, semiconductor, or insulator?
Is K4Mn4Na4O8 thermodynamically stable?
What is the crystal structure of K4Mn4Na4O8?
What is the density of K4Mn4Na4O8?
How many polymorphs of K4Mn4Na4O8 are known?
What elements does K4Mn4Na4O8 contain?
Where does the data for K4Mn4Na4O8 come from?
How It Compares
Within the layered sodium transition-metal oxides class.
Within the broader family of layered sodium transition-metal oxides, K4Mn4Na4O8 distinguishes itself through its mixed alkali-metal composition compared to simpler binary systems like NaMnO2 or NaCoO2. While many members of this class, such as NaFeO2 or Na2Ti3O7, focus on single-alkali cation frameworks, the inclusion of both potassium and sodium in this lattice offers a distinct structural pathway that may influence ion mobility and electrochemical performance differently than its alkali-only counterparts.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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