MnHO2
Manganite · gamma-MnOOH
Manganite is a naturally occurring manganese oxyhydroxide mineral that typically forms in low-temperature hydrothermal deposits. It is primarily studied for its structural properties and its role as a precursor in the synthesis of various manganese oxide materials used in electrochemical systems.
Key Properties
Cross-validated computational properties for Manganite, aggregated across 4 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 MnHO2, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 0.00 | 0.0044 | -7.348 | 4.17 |
| Pmn21 (No. 31) | orthorhombic | 0.00 | 0.0056 | -7.346 | 4.34 |
| P21/c (No. 14) | monoclinic | 0.00 | 0.0077 | -7.344 | 4.33 |
| Cm (No. 8) | monoclinic | 1.96 | 0.0128 | -7.339 | 3.94 |
| Pmc21 (No. 26) | orthorhombic | 0.00 | 0.0475 | -7.304 | 4.05 |
| P212121 (No. 19) | orthorhombic | 1.42 | 0.0518 | -7.300 | 3.50 |
| P21 (No. 4) | monoclinic | 1.11 | 0.0589 | -7.293 | 3.47 |
| I4/m (No. 87) | tetragonal | 0.04 | 0.0810 | -7.271 | 3.17 |
| P1 (No. 1) | triclinic | 0.00 | 0.1011 | -7.251 | 3.30 |
| P41212 (No. 92) | tetragonal | 1.39 | 0.5340 | -6.818 | 3.50 |
| Pmn21 (No. 31) | Orthorhombic | — | — | — | 4.34 |
| No. 0 | unknown | — | — | — | 1.05 |
Applications
Where Manganite is used.
Frequently Asked Questions
Common questions about Manganite, answered from cross-validated data.
What is MnHO2?
Manganite is a naturally occurring manganese oxyhydroxide mineral that typically forms in low-temperature hydrothermal deposits. It is primarily studied for its structural properties and its role as a precursor in the synthesis of various manganese oxide materials used in electrochemical systems.
What is MnHO2 used for?
What is the band gap of MnHO2?
Is MnHO2 a metal, semiconductor, or insulator?
Is MnHO2 thermodynamically stable?
What is the crystal structure of MnHO2?
What is the density of MnHO2?
How many polymorphs of MnHO2 are known?
What elements does MnHO2 contain?
Where does the data for MnHO2 come from?
Related Compounds
Other Oxide Oxygen-Evolution Catalysts 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.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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