Ag4Ge2Rb4S8
Ag4Ge2Rb4S8 is a thermodynamically stable, semiconducting quaternary sulfide composed of silver, germanium, rubidium, and sulfur.
About Ag4Ge2Rb4S8
Ag4Ge2Rb4S8 is a quaternary sulfide compound that exhibits semiconducting electronic behavior. As a material that resides on the convex hull, it demonstrates significant thermodynamic stability, marking it as a robust candidate for structural and functional investigations within the field of chalcogenide chemistry. Its complex arrangement of silver, germanium, rubidium, and sulfur atoms suggests a unique lattice architecture that is of interest for fundamental solid-state research. The compound is notable for its structural diversity, supported by multiple entries across crystallographic databases, which highlights its importance in the study of quaternary sulfide systems. By maintaining a stable configuration, it serves as a reliable model for understanding how alkali and transition metals interact within a germanium-sulfide framework to influence electronic properties.
Key Properties
Cross-validated computational properties for Ag4Ge2Rb4S8, 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 Ag4Ge2Rb4S8, 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/c (No. 15) | monoclinic | 1.91 | 0.0000 | -4.086 | 3.92 |
| — | — | — | — | — | 3.90 |
| C2/c (No. 15) | — | — | — | — | — |
Applications
Where Ag4Ge2Rb4S8 is used.
Frequently Asked Questions
Common questions about Ag4Ge2Rb4S8, answered from cross-validated data.
What is Ag4Ge2Rb4S8?
Ag4Ge2Rb4S8 is a thermodynamically stable, semiconducting quaternary sulfide composed of silver, germanium, rubidium, and sulfur.
What is Ag4Ge2Rb4S8 used for?
What is the band gap of Ag4Ge2Rb4S8?
Is Ag4Ge2Rb4S8 a metal, semiconductor, or insulator?
Is Ag4Ge2Rb4S8 thermodynamically stable?
What is the crystal structure of Ag4Ge2Rb4S8?
What is the density of Ag4Ge2Rb4S8?
How many polymorphs of Ag4Ge2Rb4S8 are known?
What elements does Ag4Ge2Rb4S8 contain?
Where does the data for Ag4Ge2Rb4S8 come from?
How It Compares
As a quaternary sulfide, Ag4Ge2Rb4S8 occupies a distinct niche in materials science, representing a stable endpoint in the compositional space of complex chalcogenides. Without direct structural analogs in this specific class, it stands as a primary example of how the integration of rubidium and silver into a germanium-sulfide matrix can produce a thermodynamically favorable semiconducting phase.
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).
Analyze Ag4Ge2Rb4S8 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →