F8Li4Rb4
F8Li4Rb4 is a wide-band-gap insulating fluoride compound that is theoretically stable enough to be a target for laboratory synthesis.
About F8Li4Rb4
F8Li4Rb4 is a complex fluoride compound characterized by its wide-band-gap insulating electronic structure. Its composition, involving alkali metals lithium and rubidium, positions it as an interesting subject for materials science investigations into ionic conductivity and structural stability.
Because it is identified as a near-hull material, it is considered a promising candidate for experimental synthesis. Its existence across multiple databases underscores its potential significance in the exploration of new multi-component fluoride phases.
Key Properties
Cross-validated computational properties for F8Li4Rb4, 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 F8Li4Rb4, 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 | 6.14 | 0.0059 | -4.692 | 3.51 |
| — | — | — | — | — | 2.73 |
| C2/c (No. 15) | — | — | — | — | — |
Applications
Where F8Li4Rb4 is used.
Frequently Asked Questions
Common questions about F8Li4Rb4, answered from cross-validated data.
What is F8Li4Rb4?
F8Li4Rb4 is a wide-band-gap insulating fluoride compound that is theoretically stable enough to be a target for laboratory synthesis.
What is F8Li4Rb4 used for?
What is the band gap of F8Li4Rb4?
Is F8Li4Rb4 a metal, semiconductor, or insulator?
Is F8Li4Rb4 thermodynamically stable?
What is the crystal structure of F8Li4Rb4?
What is the density of F8Li4Rb4?
How many polymorphs of F8Li4Rb4 are known?
What elements does F8Li4Rb4 contain?
Where does the data for F8Li4Rb4 come from?
How It Compares
As a unique multi-component fluoride, F8Li4Rb4 occupies a distinct niche within the broader class of alkali metal fluorides. It serves as a representative example of how complex stoichiometric combinations can yield thermodynamically viable structures that expand the known chemical space of insulating materials.
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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