Ge2K2La2Se8
This compound is a complex quaternary chalcogenide composed of germanium, potassium, lanthanum, and selenium. It belongs to a class of materials studied for their structural diversity and potential electronic or optical properties in solid-state chemistry research.
Key Properties
Cross-validated computational properties for Ge2K2La2Se8, 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 Ge2K2La2Se8, 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 | 1.62 | 0.0000 | -4.987 | 4.30 |
| — | — | — | — | — | 4.03 |
| — | — | — | — | — | 4.27 |
| P21 (No. 4) | — | — | — | — | — |
Applications
Where Ge2K2La2Se8 is used.
Frequently Asked Questions
Common questions about Ge2K2La2Se8, answered from cross-validated data.
What is Ge2K2La2Se8?
This compound is a complex quaternary chalcogenide composed of germanium, potassium, lanthanum, and selenium. It belongs to a class of materials studied for their structural diversity and potential electronic or optical properties in solid-state chemistry research.
What is Ge2K2La2Se8 used for?
What is the band gap of Ge2K2La2Se8?
Is Ge2K2La2Se8 a metal, semiconductor, or insulator?
Is Ge2K2La2Se8 thermodynamically stable?
What is the crystal structure of Ge2K2La2Se8?
What is the density of Ge2K2La2Se8?
How many polymorphs of Ge2K2La2Se8 are known?
What elements does Ge2K2La2Se8 contain?
Where does the data for Ge2K2La2Se8 come from?
Related Compounds
Other Halide Perovskite Photovoltaics in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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