Ce2O7Y2
Ce2O7Y2 has a DFT band gap of 1.65–2.06 eV across 4 reported structures in 3 space groups; its lowest-energy polymorph is triclinic (P1 (No. 1)). Cross-validated across 2 computational databases.
At a glance
Key Properties
Cross-validated computational properties for Ce2O7Y2, 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.
1.65–2.06 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.
0.040 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
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 Ce2O7Y2, 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. |
|---|---|---|---|---|---|
| P1 (No. 1) | triclinic | 1.74 | 0.0398 | -9.311 | 5.91 |
| Pmma (No. 51) | orthorhombic | 1.65 | 0.0680 | -9.283 | 5.92 |
| P-4m2 (No. 115) | tetragonal | 2.06 | 0.0901 | -9.261 | 5.86 |
| — | — | — | — | — | 5.86 |
Reference
Frequently Asked Questions
Common questions about Ce2O7Y2, answered from cross-validated data.
What is the band gap of Ce2O7Y2?
Ce2O7Y2 has a DFT-computed band gap of 1.65–2.06 eV across 4 reported structures.
More questions
Is Ce2O7Y2 a metal, semiconductor, or insulator?
With a band gap up to 2.06 eV it is a semiconductor.
Is Ce2O7Y2 thermodynamically stable?
Ce2O7Y2 has a lowest energy above hull of 0.040 eV/atom (metastable).
What is the crystal structure of Ce2O7Y2?
The lowest-energy reported polymorph of Ce2O7Y2 is triclinic symmetry, space group P1 (No. 1).
What is the density of Ce2O7Y2?
The computed density of the ground-state structure of Ce2O7Y2 is 5.91 g/cm³.
How many polymorphs of Ce2O7Y2 are known?
4 structures of Ce2O7Y2 are reported across 2 databases, spanning 3 distinct space groups.
What elements does Ce2O7Y2 contain?
Ce2O7Y2 contains Ce, O, and Y (3 elements).
Where does the data for Ce2O7Y2 come from?
Ce2O7Y2 data is cross-referenced from materials_project, omat24.
Explore
Related Compounds
Other Fluorite Oxide-Ion Conductors in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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