Y2Th8O19
Y2Th8O19 is a metastable, insulating yttrium thorium oxide used primarily in advanced materials research.
About Y2Th8O19
Y2Th8O19 is a complex oxide composed of yttrium, thorium, and oxygen. As a wide-gap insulating material, it exhibits electronic properties characteristic of highly stable ceramic oxides, though it exists in a metastable state under standard conditions.
Its structural complexity is highlighted by its presence across multiple independent materials databases, reflecting significant interest in its crystallographic arrangements. It serves as a specialized subject for research into rare-earth thorium oxide systems and their potential for high-temperature applications.
Key Properties
Cross-validated computational properties for Y2Th8O19, 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 Y2Th8O19, 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. |
|---|---|---|---|---|---|
| C2 (No. 5) | monoclinic | 3.02 | 0.0416 | -9.991 | 8.88 |
| P-4m2 (No. 115) | tetragonal | 2.85 | 0.0416 | -9.991 | 8.88 |
| Pmm2 (No. 25) | orthorhombic | 2.53 | 0.0854 | -9.947 | 9.21 |
| Pmm2 (No. 25) | Orthorhombic | — | — | — | 9.21 |
| P-4m2 (No. 115) | Tetragonal | — | — | — | 8.51 |
| Pmm2 (No. 25) | Orthorhombic | — | — | — | 8.82 |
| P-4m2 (No. 115) | — | — | — | — | — |
Applications
Where Y2Th8O19 is used.
Frequently Asked Questions
Common questions about Y2Th8O19, answered from cross-validated data.
What is Y2Th8O19?
Y2Th8O19 is a metastable, insulating yttrium thorium oxide used primarily in advanced materials research.
What is Y2Th8O19 used for?
What is the band gap of Y2Th8O19?
Is Y2Th8O19 a metal, semiconductor, or insulator?
Is Y2Th8O19 thermodynamically stable?
What is the crystal structure of Y2Th8O19?
What is the density of Y2Th8O19?
How many polymorphs of Y2Th8O19 are known?
What elements does Y2Th8O19 contain?
Where does the data for Y2Th8O19 come from?
How It Compares
As a unique oxide phase, Y2Th8O19 occupies a distinct niche in the study of actinide-containing ceramics, representing a specialized structural arrangement that remains a point of interest for researchers investigating the limits of phase stability in complex metal-oxide systems.
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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