Sr4Br6O
Sr4Br6O is a stable, wide-band-gap insulating compound composed of strontium, bromine, and oxygen.
About Sr4Br6O
Sr4Br6O is a complex inorganic compound characterized by its insulating electronic nature and wide-band-gap behavior. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural arrangement of strontium, bromine, and oxygen atoms.
This material is notable for its structural diversity, supported by multiple reported configurations across various databases. Its stability and electronic properties make it a subject of interest for fundamental research into complex halide-oxide systems.
Key Properties
Cross-validated computational properties for Sr4Br6O, 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 Sr4Br6O, 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. |
|---|---|---|---|---|---|
| P63mc (No. 186) | hexagonal | 4.22 | 0.0000 | -4.608 | 4.34 |
| P42/nmc (No. 137) | tetragonal | 3.48 | 0.0849 | -4.523 | 4.02 |
| P42/nmc (No. 137) | — | — | — | — | — |
| P63mc (No. 186) | — | — | — | — | — |
| P42/nmc (No. 137) | Tetragonal | — | — | — | 4.02 |
| P63mc (No. 186) | Hexagonal | — | — | — | 4.33 |
| P63mc (No. 186) | Hexagonal | — | — | — | 4.33 |
| P63mc (No. 186) | Hexagonal | — | — | — | 4.23 |
| P42/nmc (No. 137) | Tetragonal | — | — | — | 4.12 |
| P42/nmc (No. 137) | Tetragonal | — | — | — | 4.13 |
Frequently Asked Questions
Common questions about Sr4Br6O, answered from cross-validated data.
What is Sr4Br6O?
Sr4Br6O is a stable, wide-band-gap insulating compound composed of strontium, bromine, and oxygen.
What is the band gap of Sr4Br6O?
Is Sr4Br6O a metal, semiconductor, or insulator?
Is Sr4Br6O thermodynamically stable?
What is the crystal structure of Sr4Br6O?
What is the density of Sr4Br6O?
How many polymorphs of Sr4Br6O are known?
What elements does Sr4Br6O contain?
Where does the data for Sr4Br6O come from?
How It Compares
As a unique inorganic compound, Sr4Br6O occupies a distinct niche in materials science. Without direct structural siblings in this specific class, it serves as a primary reference point for studying the interplay between alkaline earth metals and halide-oxide frameworks.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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