Ge2K2S8Tb2
Ge2K2S8Tb2 is a stable, semiconducting quaternary sulfide compound containing germanium, potassium, sulfur, and terbium.
About Ge2K2S8Tb2
Ge2K2S8Tb2 is a complex quaternary sulfide compound composed of germanium, potassium, sulfur, and terbium. As a thermodynamically stable phase located on the convex hull, it represents a well-defined structural arrangement within its chemical system.
This material exhibits semiconducting electronic behavior, which makes it a subject of interest for fundamental solid-state physics and materials science investigations. Its unique combination of rare-earth terbium and germanium-sulfide frameworks suggests potential for specialized optoelectronic or magnetic applications.
Key Properties
Cross-validated computational properties for Ge2K2S8Tb2, 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 Ge2K2S8Tb2, 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 | 2.46 | 0.0000 | -5.385 | 3.58 |
| P21 (No. 4) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 1.88 |
Applications
Where Ge2K2S8Tb2 is used.
Frequently Asked Questions
Common questions about Ge2K2S8Tb2, answered from cross-validated data.
What is Ge2K2S8Tb2?
Ge2K2S8Tb2 is a stable, semiconducting quaternary sulfide compound containing germanium, potassium, sulfur, and terbium.
What is Ge2K2S8Tb2 used for?
What is the band gap of Ge2K2S8Tb2?
Is Ge2K2S8Tb2 a metal, semiconductor, or insulator?
Is Ge2K2S8Tb2 thermodynamically stable?
What is the crystal structure of Ge2K2S8Tb2?
What is the density of Ge2K2S8Tb2?
How many polymorphs of Ge2K2S8Tb2 are known?
What elements does Ge2K2S8Tb2 contain?
Where does the data for Ge2K2S8Tb2 come from?
How It Compares
As a quaternary sulfide, Ge2K2S8Tb2 occupies a distinct niche in materials chemistry, serving as a stable representative of complex chalcogenide frameworks that balance rare-earth functionality with semiconducting properties.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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