Cd2GeO4
Cd2GeO4 is a thermodynamically stable semiconducting oxide used in materials science research for its potential in optoelectronic applications.
About Cd2GeO4
Cd2GeO4 is a thermodynamically stable inorganic compound that exists on the convex hull, indicating significant structural robustness. As a member of the transparent conducting oxide class, it exhibits semiconducting electronic behavior, making it a subject of interest for optoelectronic research and material design.
The compound is characterized by a well-documented structural profile, with multiple reported configurations across major databases. Its stability and electronic properties position it as a notable candidate for investigations into advanced oxide materials that require both transparency and controlled conductivity.
Key Properties
Cross-validated computational properties for Cd2GeO4, 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 Cd2GeO4. 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 Cd2GeO4, 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. |
|---|---|---|---|---|---|
| — | — | 1.38 | 0.0000 | -1.617 | — |
| Pnma (No. 62) | orthorhombic | 1.18 | 0.0000 | -1.482 | — |
| Pnma (No. 62) | orthorhombic | 1.09 | 0.0000 | -5.524 | 6.19 |
| — | — | 1.28 | 0.0196 | -1.598 | — |
| — | — | 1.36 | 0.0504 | -1.567 | — |
| — | — | 0.89 | 0.0823 | -1.535 | — |
| — | — | 0.79 | 0.0887 | -1.528 | — |
| Pnma (No. 62) | orthorhombic | — | — | — | 6.13 |
| Pnma (No. 62) | orthorhombic | — | — | — | 6.36 |
| Pnma (No. 62) | orthorhombic | — | — | — | 6.33 |
| Pnma (No. 62) | orthorhombic | — | — | — | 5.95 |
Applications
Where Cd2GeO4 is used.
Frequently Asked Questions
Common questions about Cd2GeO4, answered from cross-validated data.
What is Cd2GeO4?
Cd2GeO4 is a thermodynamically stable semiconducting oxide used in materials science research for its potential in optoelectronic applications.
What is Cd2GeO4 used for?
What is the band gap of Cd2GeO4?
Is Cd2GeO4 a metal, semiconductor, or insulator?
Is Cd2GeO4 thermodynamically stable?
What is the crystal structure of Cd2GeO4?
How many polymorphs of Cd2GeO4 are known?
What elements does Cd2GeO4 contain?
Where does the data for Cd2GeO4 come from?
How It Compares
Within the transparent conducting oxides class.
Within the broader class of transparent conducting oxides, Cd2GeO4 occupies a distinct niche compared to widely utilized materials like ZnO or BaSnO3. While ZnO is a foundational industry standard for conductive coatings, Cd2GeO4 offers a different structural framework that contributes to the diversity of the ternary oxide landscape, providing researchers with alternative pathways for tuning semiconducting performance in complex oxide systems.
Related Compounds
Other Transparent Conducting Oxides in the database.
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)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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