Ge9Li4O20
Ge9Li4O20 is a metastable, insulating lithium-germanium oxide compound used in solid-state materials research.
About Ge9Li4O20
Ge9Li4O20 is a complex lithium-germanium oxide that functions as a wide-gap insulator. Its structural arrangement highlights the diversity of lithium-based oxide frameworks, reflecting the intricate coordination environments possible between lithium, germanium, and oxygen atoms.
As a metastable compound, it represents a unique phase within the lithium oxide family. Its existence across multiple structural configurations underscores the complexity of its synthesis and the potential for tailoring its properties for specialized solid-state applications.
Key Properties
Cross-validated computational properties for Ge9Li4O20, 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.
Reported Structures
Lowest-energy structures reported for Ge9Li4O20, 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. |
|---|---|---|---|---|---|
| C2 (No. 5) | monoclinic | 3.18 | 0.0574 | -6.650 | 4.51 |
| C2 (No. 5) | — | — | — | — | — |
| C2 (No. 5) | — | — | — | — | — |
Applications
Where Ge9Li4O20 is used.
Frequently Asked Questions
Common questions about Ge9Li4O20, answered from cross-validated data.
What is Ge9Li4O20?
Ge9Li4O20 is a metastable, insulating lithium-germanium oxide compound used in solid-state materials research.
What is Ge9Li4O20 used for?
What is the band gap of Ge9Li4O20?
Is Ge9Li4O20 a metal, semiconductor, or insulator?
Is Ge9Li4O20 thermodynamically stable?
What is the crystal structure of Ge9Li4O20?
What is the density of Ge9Li4O20?
How many polymorphs of Ge9Li4O20 are known?
What elements does Ge9Li4O20 contain?
Where does the data for Ge9Li4O20 come from?
How It Compares
Within the lithium oxides class.
Unlike the highly stable and widely utilized cathode materials such as LiCoO2, LiNiO2, and LiMn2O4, Ge9Li4O20 exists in a metastable state. While many lithium oxides like Li2O serve as fundamental building blocks or electrolytes, this germanium-based variant occupies a more niche structural space compared to the common silicate-like Li4SiO4 or the vanadium-based LiV3O8.
Related Compounds
Other Lithium Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
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