F12Ge2Rb4
F12Ge2Rb4 is a thermodynamically stable, wide-band-gap fluoride perovskite used primarily in fundamental materials science research.
About F12Ge2Rb4
F12Ge2Rb4 is a distinct member of the halide perovskite class, characterized by its wide-band-gap insulating electronic nature. Its position on the thermodynamic convex hull highlights its structural stability, making it a reliable subject for fundamental research into inorganic fluoride-based materials.
As a material with multiple reported structures, it serves as a key reference point for understanding the structural diversity within complex halide systems. Its insulating behavior contrasts with more conductive perovskite counterparts, positioning it as a specialized candidate for dielectric or optical applications where wide-gap materials are required.
Key Properties
Cross-validated computational properties for F12Ge2Rb4, 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 F12Ge2Rb4, 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. |
|---|---|---|---|---|---|
| P-3m1 (No. 164) | trigonal | 5.81 | 0.0000 | -5.056 | 4.26 |
| P63mc (No. 186) | hexagonal | 5.88 | 0.0019 | -5.054 | 4.12 |
| Fm-3m (No. 225) | cubic | 5.98 | 0.0050 | -5.051 | 3.95 |
| P63mc (No. 186) | — | — | — | — | — |
| — | — | — | — | — | 3.77 |
Applications
Where F12Ge2Rb4 is used.
Frequently Asked Questions
Common questions about F12Ge2Rb4, answered from cross-validated data.
What is F12Ge2Rb4?
F12Ge2Rb4 is a thermodynamically stable, wide-band-gap fluoride perovskite used primarily in fundamental materials science research.
What is F12Ge2Rb4 used for?
What is the band gap of F12Ge2Rb4?
Is F12Ge2Rb4 a metal, semiconductor, or insulator?
Is F12Ge2Rb4 thermodynamically stable?
What is the crystal structure of F12Ge2Rb4?
What is the density of F12Ge2Rb4?
How many polymorphs of F12Ge2Rb4 are known?
What elements does F12Ge2Rb4 contain?
Where does the data for F12Ge2Rb4 come from?
How It Compares
Within the halide perovskite photovoltaics class.
Unlike the highly conductive and widely studied photovoltaic materials like CsPbBr3 or CsSnI3, F12Ge2Rb4 acts as a wide-gap insulator. While many members of this class are optimized for charge transport, this compound is distinguished by its stability and insulating character, placing it in a different functional category than the narrow-gap semiconductors like RbPbF3 or the tin-based halide variants.
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).
Analyze F12Ge2Rb4 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →