La2O7Zr2
La2O7Zr2 has a DFT band gap of 0.06–3.73 eV across 4 reported structures in 3 space groups; its lowest-energy polymorph is cubic (Fd-3m (No. 227)). Cross-validated across 2 computational databases.
At a glance
Key Properties
Cross-validated computational properties for La2O7Zr2, 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.
0.06–3.73 eV
Range across DFT structures
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.
0.000 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.
On hull (stable)
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
4
2 databases, 3 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for La2O7Zr2, 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. |
|---|---|---|---|---|---|
| Fd-3m (No. 227) | cubic | 3.73 | 0.0000 | -9.510 | 6.02 |
| Pmma (No. 51) | orthorhombic | 2.23 | 0.2721 | -9.238 | 5.97 |
| Fd-3m (No. 227) | cubic | 0.06 | 0.3828 | -9.127 | 6.12 |
| C2/m (No. 12) | — | — | — | — | — |
Reference
Frequently Asked Questions
Common questions about La2O7Zr2, answered from cross-validated data.
What is the band gap of La2O7Zr2?
La2O7Zr2 has a DFT-computed band gap of 0.06–3.73 eV across 4 reported structures.
More questions
Is La2O7Zr2 a metal, semiconductor, or insulator?
With a wide band gap up to 3.73 eV it is an insulator / wide-band-gap material.
Is La2O7Zr2 thermodynamically stable?
Yes — La2O7Zr2 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of La2O7Zr2?
The lowest-energy reported polymorph of La2O7Zr2 is cubic symmetry, space group Fd-3m (No. 227).
What is the density of La2O7Zr2?
The computed density of the ground-state structure of La2O7Zr2 is 6.02 g/cm³.
How many polymorphs of La2O7Zr2 are known?
4 structures of La2O7Zr2 are reported across 2 databases, spanning 3 distinct space groups.
What elements does La2O7Zr2 contain?
La2O7Zr2 contains La, O, and Zr (3 elements).
Where does the data for La2O7Zr2 come from?
La2O7Zr2 data is cross-referenced from materials_project, nomad.
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Related Compounds
Other Perovskite Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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