Li4GeO4
Li4GeO4 is a stable, insulating lithium germanium oxide used in materials research for solid-state ionics.
About Li4GeO4
Li4GeO4 is a member of the lithium oxide family, characterized by its wide-band-gap insulating electronic nature. As a thermodynamically stable phase residing on the convex hull, it represents a robust crystalline arrangement within this chemical class.
Its structural integrity makes it a subject of interest for materials scientists investigating ion-conducting pathways. Due to its stability and electronic properties, it serves as a foundational material for exploring lithium-rich oxide systems in solid-state energy storage applications.
Key Properties
Cross-validated computational properties for Li4GeO4, 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 Li4GeO4. 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 Li4GeO4, 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. |
|---|---|---|---|---|---|
| — | — | 4.53 | 0.0000 | -2.179 | — |
| Cmcm (No. 63) | orthorhombic | 4.29 | 0.0000 | -2.170 | — |
| Cmcm (No. 63) | orthorhombic | 4.10 | 0.0000 | -5.859 | 3.21 |
| — | — | 4.15 | 0.0251 | -2.154 | — |
| Cmcm (No. 63) | orthorhombic | — | — | — | 3.14 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 3.19 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 3.04 |
| Cmcm (No. 63) | orthorhombic | — | — | — | 3.16 |
Synthesis Routes
Literature-extracted synthesis procedures targeting Li4GeO4.
Applications
Where Li4GeO4 is used.
Frequently Asked Questions
Common questions about Li4GeO4, answered from cross-validated data.
What is Li4GeO4?
Li4GeO4 is a stable, insulating lithium germanium oxide used in materials research for solid-state ionics.
What is Li4GeO4 used for?
What is the band gap of Li4GeO4?
Is Li4GeO4 a metal, semiconductor, or insulator?
Is Li4GeO4 thermodynamically stable?
What is the crystal structure of Li4GeO4?
How many polymorphs of Li4GeO4 are known?
How is Li4GeO4 synthesized?
What elements does Li4GeO4 contain?
Where does the data for Li4GeO4 come from?
How It Compares
Within the lithium oxides class.
Unlike the transition-metal-based lithium oxides such as LiNiO2, LiMn2O4, or LiCoO2, which are primarily utilized for their redox-active cathode properties, Li4GeO4 functions more as a structural framework material. It shares closer chemical and structural motifs with Li4SiO4, both serving as important oxides where the germanium or silicon centers provide a stable anionic sublattice for lithium ion mobility.
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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