As2Fe2La2O2
As2Fe2La2O2 is a semiconducting iron-based compound known for its structural complexity and metastable nature.
About As2Fe2La2O2
As2Fe2La2O2 is a complex inorganic compound belonging to the iron-based superconductor class. It is characterized by its semiconducting electronic nature, which distinguishes it from the metallic behavior often sought in high-temperature superconducting materials.
Due to its position above the thermodynamic hull, this material is considered metastable, making it a subject of interest for researchers studying synthetic pathways and structural stability. Its diverse structural configurations highlight the intricate bonding possibilities between iron, arsenic, lanthanum, and oxygen.
Key Properties
Cross-validated computational properties for As2Fe2La2O2, aggregated across 2 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 As2Fe2La2O2, 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. |
|---|---|---|---|---|---|
| Ibca (No. 73) | orthorhombic | 1.29 | 0.1730 | -7.524 | 6.05 |
| P4/nmm (No. 129) | tetragonal | 0.00 | 0.1849 | -7.512 | 6.03 |
| P21/m (No. 11) | monoclinic | 0.00 | 0.1872 | -7.509 | 6.06 |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
| P4/nmm (No. 129) | — | — | — | — | — |
Applications
Where As2Fe2La2O2 is used.
Frequently Asked Questions
Common questions about As2Fe2La2O2, answered from cross-validated data.
What is As2Fe2La2O2?
As2Fe2La2O2 is a semiconducting iron-based compound known for its structural complexity and metastable nature.
What is As2Fe2La2O2 used for?
What is the band gap of As2Fe2La2O2?
Is As2Fe2La2O2 a metal, semiconductor, or insulator?
Is As2Fe2La2O2 thermodynamically stable?
What is the crystal structure of As2Fe2La2O2?
What is the density of As2Fe2La2O2?
How many polymorphs of As2Fe2La2O2 are known?
What elements does As2Fe2La2O2 contain?
Where does the data for As2Fe2La2O2 come from?
How It Compares
Within the iron-based superconductors class.
Within the diverse family of iron-based materials, As2Fe2La2O2 occupies a distinct niche compared to more common members like FeSe. While FeSe is widely recognized for its superconducting properties and metallic character, As2Fe2La2O2 presents a semiconducting profile that suggests different electronic interactions, placing it in a unique category of interest for fundamental materials research.
Related Compounds
Other Iron-Based Superconductors 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).
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