Na2MnO4
Sodium manganate · Sodium manganate(VI)
Sodium manganate is an inorganic compound that serves as an intermediate in the industrial production of various manganese chemicals. It is typically prepared through the oxidation of manganese dioxide in an alkaline environment and is primarily utilized for its chemical reactivity in synthetic processes.
Overview
Key Properties
Cross-validated computational properties for Sodium manganate, 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.
Metallic / not reported
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.
0.084 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.
Metastable
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
5
3 databases, 1 space group
Crystallography
Reported Structures
Lowest-energy structures reported for Na2MnO4, 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. |
|---|---|---|---|---|---|
| P63mc (No. 186) | hexagonal | 0.00 | 0.0838 | -6.079 | 2.70 |
| P63mc (No. 186) | Hexagonal | — | — | — | 2.70 |
| P63mc (No. 186) | Hexagonal | — | — | — | 2.88 |
| P63mc (No. 186) | Hexagonal | — | — | — | 2.76 |
| P63mc (No. 186) | — | — | — | — | — |
Synthesis
Synthesis Routes
Literature-extracted synthesis procedures targeting Na2MnO4.
Sol-Gel
Procedure available · ceder_solid_state
Sol-Gel
Procedure available · ceder_solid_state
Sol-Gel
Procedure available · ceder_solid_state
Uses
Applications
Where Sodium manganate is used.
Chemical synthesis intermediateOxidizing agentPrecursor for permanganate production
Reference
Frequently Asked Questions
Common questions about Sodium manganate, answered from cross-validated data.
What is Na2MnO4?
Sodium manganate is an inorganic compound that serves as an intermediate in the industrial production of various manganese chemicals. It is typically prepared through the oxidation of manganese dioxide in an alkaline environment and is primarily utilized for its chemical reactivity in synthetic processes.
What is Na2MnO4 used for?
Sodium manganate (Na2MnO4) is used in chemical synthesis intermediate, oxidizing agent, and precursor for permanganate production.
What is the band gap of Na2MnO4?
Sodium manganate (Na2MnO4) is computed to be metallic (no band gap) in the reported DFT structures.
Is Na2MnO4 a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is Na2MnO4 thermodynamically stable?
Sodium manganate (Na2MnO4) has a lowest energy above hull of 0.084 eV/atom (metastable).
What is the crystal structure of Na2MnO4?
The lowest-energy reported polymorph of Sodium manganate (Na2MnO4) is hexagonal symmetry, space group P63mc (No. 186).
What is the density of Na2MnO4?
The computed density of the ground-state structure of Sodium manganate (Na2MnO4) is 2.70 g/cm³.
How many polymorphs of Na2MnO4 are known?
5 structures of Na2MnO4 are reported across 3 databases, spanning 1 distinct space group.
How is Na2MnO4 synthesized?
Literature-reported routes for Na2MnO4 include sol-gel (3 procedures documented).
What elements does Na2MnO4 contain?
Sodium manganate (Na2MnO4) contains Mn, Na, and O (3 elements).
Where does the data for Na2MnO4 come from?
Na2MnO4 data is cross-referenced from materials_project, mpaloe, jarvis.
Explore
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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