Ge2K2La2S8
Ge2K2La2S8 is a stable, semiconducting quaternary sulfide material containing germanium, potassium, lanthanum, and sulfur.
About Ge2K2La2S8
Ge2K2La2S8 is a quaternary sulfide compound composed of germanium, potassium, lanthanum, and sulfur. As a thermodynamically stable phase located on the convex hull, it represents a robust structural configuration within its chemical system.
This material exhibits semiconducting electronic character, making it an interesting candidate for solid-state research. Its existence across multiple structural databases highlights its significance as a well-defined inorganic compound for materials science investigations.
Key Properties
Cross-validated computational properties for Ge2K2La2S8, 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 Ge2K2La2S8, 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. |
|---|---|---|---|---|---|
| P21 (No. 4) | monoclinic | 2.30 | 0.0000 | -5.480 | 3.34 |
| P21 (No. 4) | — | — | — | — | — |
| — | — | — | — | — | 3.22 |
Applications
Where Ge2K2La2S8 is used.
Frequently Asked Questions
Common questions about Ge2K2La2S8, answered from cross-validated data.
What is Ge2K2La2S8?
Ge2K2La2S8 is a stable, semiconducting quaternary sulfide material containing germanium, potassium, lanthanum, and sulfur.
What is Ge2K2La2S8 used for?
What is the band gap of Ge2K2La2S8?
Is Ge2K2La2S8 a metal, semiconductor, or insulator?
Is Ge2K2La2S8 thermodynamically stable?
What is the crystal structure of Ge2K2La2S8?
What is the density of Ge2K2La2S8?
How many polymorphs of Ge2K2La2S8 are known?
What elements does Ge2K2La2S8 contain?
Where does the data for Ge2K2La2S8 come from?
How It Compares
As a unique quaternary sulfide, Ge2K2La2S8 serves as a foundational example of complex chalcogenide chemistry. Without direct structural siblings in this specific class, it stands as a standalone reference point for understanding how the integration of alkali metals and rare-earth elements influences the electronic and thermodynamic properties of germanium-based sulfides.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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