Dy2Ge2O7
Dy2Ge2O7 is a stable, insulating rare-earth germanate compound utilized in advanced materials research.
About Dy2Ge2O7
Dy2Ge2O7 is a chemically robust, wide-band-gap insulating oxide that exists as a thermodynamically stable phase. Its structural integrity is underscored by its presence on the convex hull, making it a reliable candidate for fundamental studies in rare-earth germanate systems.
Due to its insulating nature and stability, this compound serves as a significant subject for researchers investigating the interplay between lanthanide magnetism and germanate frameworks. It is frequently analyzed within the context of complex oxide materials where structural precision and electronic insulation are required.
Key Properties
Cross-validated computational properties for Dy2Ge2O7, aggregated across 5 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Dy2Ge2O7. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for Dy2Ge2O7, 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. |
|---|---|---|---|---|---|
| — | — | 4.02 | 0.0000 | -2.888 | — |
| P41212 (No. 92) | tetragonal | 3.74 | 0.0000 | -7.888 | 6.54 |
| Fd-3m (No. 227) | cubic | 3.15 | 0.0000 | -2.816 | — |
| C2 (No. 5) | monoclinic | 3.86 | 0.0063 | -7.882 | 6.25 |
| Fd-3m (No. 227) | cubic | 2.97 | 0.0123 | -7.876 | 7.93 |
| P21/c (No. 14) | monoclinic | 3.82 | 0.0142 | -7.874 | 6.33 |
| — | — | 3.65 | 0.0257 | -2.862 | — |
| P-1 (No. 2) | triclinic | 3.33 | 0.0280 | -7.860 | 6.70 |
| Pnma (No. 62) | orthorhombic | 3.56 | 0.0294 | -7.859 | 6.30 |
| — | — | 3.89 | 0.0319 | -2.856 | — |
| C2 (No. 5) | monoclinic | 3.92 | 0.0544 | -2.761 | — |
| P21/c (No. 14) | monoclinic | 3.91 | 0.0583 | -2.758 | — |
Applications
Where Dy2Ge2O7 is used.
Frequently Asked Questions
Common questions about Dy2Ge2O7, answered from cross-validated data.
What is Dy2Ge2O7?
Dy2Ge2O7 is a stable, insulating rare-earth germanate compound utilized in advanced materials research.
What is Dy2Ge2O7 used for?
What is the band gap of Dy2Ge2O7?
Is Dy2Ge2O7 a metal, semiconductor, or insulator?
Is Dy2Ge2O7 thermodynamically stable?
What is the crystal structure of Dy2Ge2O7?
What is the density of Dy2Ge2O7?
How many polymorphs of Dy2Ge2O7 are known?
What elements does Dy2Ge2O7 contain?
Where does the data for Dy2Ge2O7 come from?
How It Compares
As a thermodynamically stable member of the rare-earth germanate family, Dy2Ge2O7 represents a well-defined structural archetype. It serves as a benchmark for understanding how the inclusion of heavy lanthanides influences the lattice dynamics and insulating behavior of these complex oxide systems.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
- alexandria — Data from Alexandria. Cite: Schmidt et al., npj Comput. Mater. 10, 200 (2024). (CC-BY-4.0)
Analyze Dy2Ge2O7 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 85 source databases.
Explore the Platform →