Ge8Rb8Se20
Ge8Rb8Se20 is a thermodynamically stable semiconducting compound composed of germanium, rubidium, and selenium.
About Ge8Rb8Se20
Ge8Rb8Se20 is a semiconducting material characterized by its thermodynamic stability on the convex hull. As a distinct member of the broader halide perovskite and chalcogenide-related landscape, it represents a specialized structural arrangement of germanium, rubidium, and selenium atoms. Its electronic properties make it a subject of interest for researchers investigating non-traditional semiconductor architectures.
The compound is recognized for its structural complexity, with multiple reported configurations across materials databases. This data richness highlights its potential as a stable candidate for fundamental studies in solid-state chemistry and optoelectronic material development.
Key Properties
Cross-validated computational properties for Ge8Rb8Se20, 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 Ge8Rb8Se20, 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 | 1.54 | 0.0000 | -4.147 | 3.85 |
| C2/c (No. 15) | — | — | — | — | — |
| — | — | — | — | — | 3.47 |
Applications
Where Ge8Rb8Se20 is used.
Frequently Asked Questions
Common questions about Ge8Rb8Se20, answered from cross-validated data.
What is Ge8Rb8Se20?
Ge8Rb8Se20 is a thermodynamically stable semiconducting compound composed of germanium, rubidium, and selenium.
What is Ge8Rb8Se20 used for?
What is the band gap of Ge8Rb8Se20?
Is Ge8Rb8Se20 a metal, semiconductor, or insulator?
Is Ge8Rb8Se20 thermodynamically stable?
What is the crystal structure of Ge8Rb8Se20?
What is the density of Ge8Rb8Se20?
How many polymorphs of Ge8Rb8Se20 are known?
What elements does Ge8Rb8Se20 contain?
Where does the data for Ge8Rb8Se20 come from?
How It Compares
Within the halide perovskite photovoltaics class.
Within the diverse group of halide perovskite-related materials, Ge8Rb8Se20 stands out for its unique chalcogenide composition compared to the more conventional halide-based members like CsPbBr3 or CsSnI3. While many of its siblings focus on lead or tin-based halide frameworks, this compound utilizes a selenium-based anionic framework, offering a distinct electronic profile that differentiates it from the standard perovskite structural motifs found in materials like RbPbF3.
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).
- 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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