Li2GeO3
lithium metagermanate · LGO
Lithium metagermanate is a stable, insulating lithium oxide ceramic frequently studied for its structural properties and potential utility in specialized technological applications.
About lithium metagermanate
Lithium metagermanate is a thermodynamically stable member of the lithium oxide family, characterized by its wide-band-gap insulating nature. Its structural integrity and chemical stability make it a subject of significant interest for advanced materials research, particularly where reliable dielectric or ionic transport properties are required.
The compound is recognized for its well-defined crystalline phases, supported by multiple structural reports in scientific databases. Its role as a stable oxide positions it as a versatile candidate for specialized ceramic applications and as a model system for understanding lithium-based structural frameworks.
Key Properties
Cross-validated computational properties for lithium metagermanate, 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 Li2GeO3. 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 Li2GeO3, 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. |
|---|---|---|---|---|---|
| — | — | 3.81 | 0.0000 | -2.186 | — |
| Cmc21 (No. 36) | orthorhombic | 3.69 | 0.0000 | -2.128 | — |
| Cmc21 (No. 36) | orthorhombic | 3.57 | 0.0000 | -6.203 | 3.55 |
| — | — | 4.47 | 0.0189 | -2.167 | — |
| — | — | 3.19 | 0.0776 | -2.109 | — |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 3.35 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 3.49 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 3.53 |
| Cmc21 (No. 36) | orthorhombic | — | — | — | 3.46 |
Synthesis Routes
Literature-extracted synthesis procedures targeting Li2GeO3.
Applications
Where lithium metagermanate is used.
Frequently Asked Questions
Common questions about lithium metagermanate, answered from cross-validated data.
What is Li2GeO3?
Lithium metagermanate is a stable, insulating lithium oxide ceramic frequently studied for its structural properties and potential utility in specialized technological applications.
What is Li2GeO3 used for?
What is the band gap of Li2GeO3?
Is Li2GeO3 a metal, semiconductor, or insulator?
Is Li2GeO3 thermodynamically stable?
What is the crystal structure of Li2GeO3?
How many polymorphs of Li2GeO3 are known?
How is Li2GeO3 synthesized?
What elements does Li2GeO3 contain?
Where does the data for Li2GeO3 come from?
How It Compares
Within the lithium oxides class.
Unlike the transition-metal-rich lithium oxides such as LiCoO2 or LiNiO2, which are primarily utilized for their electrochemical redox activity in battery cathodes, Li2GeO3 functions as a stable, insulating ceramic. It shares more structural commonality with other main-group lithium oxides like Li4SiO4, serving as a robust dielectric or functional material rather than an active electrode component.
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)
- 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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