F20Rb2Sm6
F20Rb2Sm6 is a stable, insulating crystalline compound containing rubidium, samarium, and fluorine.
About F20Rb2Sm6
F20Rb2Sm6 is a complex fluoride compound composed of rubidium, samarium, and fluorine. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline arrangement that maintains structural integrity under standard conditions.
Characterized by its wide-band-gap insulating electronic profile, this material is of significant interest for fundamental solid-state research. Its unique stoichiometry and electronic nature make it a specialized subject for investigations into rare-earth fluoride systems.
Key Properties
Cross-validated computational properties for F20Rb2Sm6, 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 F20Rb2Sm6, 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 | 6.91 | 0.0000 | -6.709 | 5.77 |
| No. 0 | unknown | — | — | — | 0.89 |
| — | — | — | — | — | 3.85 |
Applications
Where F20Rb2Sm6 is used.
Frequently Asked Questions
Common questions about F20Rb2Sm6, answered from cross-validated data.
What is F20Rb2Sm6?
F20Rb2Sm6 is a stable, insulating crystalline compound containing rubidium, samarium, and fluorine.
What is F20Rb2Sm6 used for?
What is the band gap of F20Rb2Sm6?
Is F20Rb2Sm6 a metal, semiconductor, or insulator?
Is F20Rb2Sm6 thermodynamically stable?
What is the crystal structure of F20Rb2Sm6?
What is the density of F20Rb2Sm6?
How many polymorphs of F20Rb2Sm6 are known?
What elements does F20Rb2Sm6 contain?
Where does the data for F20Rb2Sm6 come from?
How It Compares
As a unique member of the complex fluoride family, F20Rb2Sm6 occupies a distinct position due to its specific ratio of alkali metal to rare-earth cations. Unlike simpler binary fluorides, this compound exhibits a complex lattice structure that contributes to its stability and insulating behavior within its class.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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