RbF
Rubidium fluoride · Rubidium(I) fluoride
Rubidium fluoride is an inorganic salt composed of rubidium and fluorine. It is primarily utilized as a specialized chemical reagent in laboratory research and as a component in certain optical materials.
FRb
Overview
Key Properties
Cross-validated computational properties for Rubidium fluoride, aggregated across 4 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.
5.52–5.91 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
90
4 databases, 20 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for RbF, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 5.52 | 0.0000 | -4.321 | 3.88 |
| Pm-3m (No. 221) | cubic | 5.91 | 0.0516 | -4.269 | 4.53 |
| P21/c (No. 14) | Monoclinic | — | — | — | 1.95 |
| P21/c (No. 14) | Monoclinic | — | — | — | 1.36 |
| I41/amd (No. 141) | Tetragonal | — | — | — | 2.29 |
| C2/c (No. 15) | Monoclinic | — | — | — | 1.55 |
| P21/m (No. 11) | Monoclinic | — | — | — | 1.01 |
| I41/amd (No. 141) | Tetragonal | — | — | — | 1.96 |
| Fm-3m (No. 225) | Cubic | — | — | — | 3.67 |
| I41/amd (No. 141) | Tetragonal | — | — | — | 2.96 |
| P21/m (No. 11) | Monoclinic | — | — | — | 0.70 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.45 |
Uses
Applications
Where Rubidium fluoride is used.
Laboratory researchOptical materialsChemical synthesis
Reference
Frequently Asked Questions
Common questions about Rubidium fluoride, answered from cross-validated data.
What is RbF?
Rubidium fluoride is an inorganic salt composed of rubidium and fluorine. It is primarily utilized as a specialized chemical reagent in laboratory research and as a component in certain optical materials.
More questions
What is RbF used for?
Rubidium fluoride (RbF) is used in laboratory research, optical materials, and chemical synthesis.
What is the band gap of RbF?
Rubidium fluoride (RbF) has a DFT-computed band gap of 5.52–5.91 eV across 90 reported structures.
Is RbF a metal, semiconductor, or insulator?
With a wide band gap up to 5.91 eV it is an insulator / wide-band-gap material.
Is RbF thermodynamically stable?
Yes — Rubidium fluoride (RbF) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of RbF?
The lowest-energy reported polymorph of Rubidium fluoride (RbF) is cubic symmetry, space group Fm-3m (No. 225).
What is the density of RbF?
The computed density of the ground-state structure of Rubidium fluoride (RbF) is 3.88 g/cm³.
How many polymorphs of RbF are known?
90 structures of RbF are reported across 4 databases, spanning 20 distinct space groups.
What elements does RbF contain?
Rubidium fluoride (RbF) contains F and Rb (2 elements).
Where does the data for RbF come from?
RbF data is cross-referenced from materials_project, mpaloe, cod.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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