Li2Ge2O5
Li2Ge2O5 is a stable, wide-gap insulating lithium germanate oxide used in materials science research.
About Li2Ge2O5
Li2Ge2O5 is a lithium germanate oxide that functions as a wide-band-gap insulator. Its electronic character and structural properties place it within the broader family of lithium oxides, where it is recognized for its near-hull thermodynamic stability, suggesting it is a viable candidate for experimental synthesis and characterization.
This material is of interest to researchers investigating novel lithium-ion pathways and structural frameworks. By occupying a stable region in the phase space, it serves as a foundational subject for understanding how germanium-based oxides can be integrated into specialized electrochemical or dielectric applications.
Key Properties
Cross-validated computational properties for Li2Ge2O5, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Li2Ge2O5. 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 Li2Ge2O5, 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. |
|---|---|---|---|---|---|
| — | — | 3.69 | 0.0033 | -2.088 | — |
| Ccc2 (No. 37) | orthorhombic | 4.12 | 0.0216 | -6.446 | 3.53 |
| — | — | 2.74 | 0.0404 | -2.051 | — |
| Ccc2 (No. 37) | orthorhombic | 3.30 | 0.0423 | -1.969 | — |
| — | — | 0.00 | 0.3297 | -1.762 | — |
| — | — | 0.00 | 0.9699 | -1.122 | — |
| Ccc2 (No. 37) | orthorhombic | — | — | — | 3.36 |
| Ccc2 (No. 37) | orthorhombic | — | — | — | 3.56 |
| Ccc2 (No. 37) | orthorhombic | — | — | — | 3.47 |
Applications
Where Li2Ge2O5 is used.
Frequently Asked Questions
Common questions about Li2Ge2O5, answered from cross-validated data.
What is Li2Ge2O5?
Li2Ge2O5 is a stable, wide-gap insulating lithium germanate oxide used in materials science research.
What is Li2Ge2O5 used for?
What is the band gap of Li2Ge2O5?
Is Li2Ge2O5 a metal, semiconductor, or insulator?
Is Li2Ge2O5 thermodynamically stable?
What is the crystal structure of Li2Ge2O5?
What is the density of Li2Ge2O5?
How many polymorphs of Li2Ge2O5 are known?
What elements does Li2Ge2O5 contain?
Where does the data for Li2Ge2O5 come from?
How It Compares
Within the lithium oxides class.
Unlike the widely utilized cathode materials LiNiO2, LiMn2O4, and LiCoO2, which are prized for their transition metal-driven redox activity, Li2Ge2O5 acts as a stable, insulating oxide. It shares more structural commonality with Li4SiO4 in terms of its role as a potential host or electrolyte-related framework rather than an active electrode material.
Related Compounds
Other Lithium 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)
- 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.
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