Cr4F28Pb8
Cr4F28Pb8 is a thermodynamically stable, insulating crystalline compound composed of chromium, fluorine, and lead.
About Cr4F28Pb8
Cr4F28Pb8 is a complex inorganic compound characterized by its wide-gap insulating electronic profile. It exists as a thermodynamically stable phase on the convex hull, indicating a robust structural arrangement that resists decomposition under standard conditions.
This material represents a specialized chemical system that integrates chromium, fluorine, and lead. Its stability and insulating nature make it a subject of interest for fundamental materials science studies exploring the interplay between transition metals and heavy-metal fluorides.
Key Properties
Cross-validated computational properties for Cr4F28Pb8, 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 Cr4F28Pb8, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 3.61 | 0.0000 | -5.887 | 6.86 |
| No. 0 | unknown | — | — | — | 1.70 |
| P21/c (No. 14) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Cr4F28Pb8, answered from cross-validated data.
What is Cr4F28Pb8?
Cr4F28Pb8 is a thermodynamically stable, insulating crystalline compound composed of chromium, fluorine, and lead.
What is the band gap of Cr4F28Pb8?
Is Cr4F28Pb8 a metal, semiconductor, or insulator?
Is Cr4F28Pb8 thermodynamically stable?
What is the crystal structure of Cr4F28Pb8?
What is the density of Cr4F28Pb8?
How many polymorphs of Cr4F28Pb8 are known?
What elements does Cr4F28Pb8 contain?
Where does the data for Cr4F28Pb8 come from?
How It Compares
As a unique inorganic system, Cr4F28Pb8 serves as a distinct entry in the landscape of complex fluorides. Its position on the convex hull ensures it remains a stable reference point for future investigations into similar multi-element crystalline frameworks.
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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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