MnAlN2
MnAlN2 is a complex ternary nitride semiconductor known for its metastable structural properties.
About MnAlN2
MnAlN2 is a ternary nitride semiconductor that integrates manganese and aluminum within a nitrogen-based lattice. Its electronic profile suggests potential utility in specialized semiconductor applications, though its synthesis remains a subject of ongoing research due to its complex structural landscape.
As a material that sits above the thermodynamic hull, MnAlN2 represents a metastable phase within the nitride family. Its existence across multiple reported structures highlights a significant degree of structural diversity, making it a subject of interest for researchers investigating non-equilibrium growth techniques.
Key Properties
Cross-validated computational properties for MnAlN2, 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 MnAlN2, 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. |
|---|---|---|---|---|---|
| I-42d (No. 122) | tetragonal | 0.00 | 0.2254 | -8.201 | 4.04 |
| Pbca (No. 61) | orthorhombic | 0.12 | 0.2591 | -8.167 | 4.09 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 2.99 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 3.71 |
| P4/nmm (No. 129) | Tetragonal | — | — | — | 4.16 |
| P21/m (No. 11) | Monoclinic | — | — | — | 2.30 |
| P21/m (No. 11) | Monoclinic | — | — | — | 2.68 |
| P-1 (No. 2) | Triclinic | — | — | — | 4.49 |
| I-42d (No. 122) | — | — | — | — | — |
Applications
Where MnAlN2 is used.
Frequently Asked Questions
Common questions about MnAlN2, answered from cross-validated data.
What is MnAlN2?
MnAlN2 is a complex ternary nitride semiconductor known for its metastable structural properties.
What is MnAlN2 used for?
What is the band gap of MnAlN2?
Is MnAlN2 a metal, semiconductor, or insulator?
Is MnAlN2 thermodynamically stable?
What is the crystal structure of MnAlN2?
What is the density of MnAlN2?
How many polymorphs of MnAlN2 are known?
What elements does MnAlN2 contain?
Where does the data for MnAlN2 come from?
How It Compares
Within the nitride semiconductors class.
Unlike the highly stable and widely utilized binary nitrides such as GaN and AlN, MnAlN2 is characterized by its metastable nature. While GaN serves as a cornerstone for optoelectronics due to its robust thermodynamic stability, MnAlN2 offers a more complex, less stable alternative that challenges current synthesis paradigms within the broader nitride semiconductor class.
Related Compounds
Other Nitride Semiconductors 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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