SrBr2
strontium bromide · strontium dibromide
Strontium bromide is a stable, insulating salt composed of strontium and bromine that is primarily utilized in specialized optical and research applications.
About strontium bromide
Strontium bromide is a robust, thermodynamically stable inorganic halide characterized by its wide-gap insulating electronic structure. Its ability to maintain structural integrity makes it a reliable candidate for various solid-state applications where stable dielectric or optical properties are required. The material is well-documented in structural databases, reflecting its significance in materials science research. It serves as a foundational compound for studies involving alkaline earth halides, particularly in the development of materials that require precise control over electronic and optical behavior.
Key Properties
Cross-validated computational properties for strontium bromide, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of SrBr2. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for SrBr2, 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. |
|---|---|---|---|---|---|
| — | — | 4.72 | 0.0000 | -2.362 | — |
| Pnma (No. 62) | orthorhombic | 4.65 | 0.0000 | -2.244 | — |
| P4/n (No. 85) | tetragonal | 4.30 | 0.0000 | -4.161 | 4.20 |
| Pnma (No. 62) | orthorhombic | 4.47 | 0.0012 | -4.160 | 3.89 |
| — | — | 4.72 | 0.0055 | -2.357 | — |
| — | — | 4.41 | 0.0133 | -2.349 | — |
| — | — | 4.41 | 0.0138 | -2.348 | — |
| — | — | 4.69 | 0.0145 | -2.348 | — |
| — | — | 4.54 | 0.0157 | -2.346 | — |
| — | — | 4.60 | 0.0180 | -2.344 | — |
| — | — | 4.67 | 0.0195 | -2.343 | — |
| — | — | 4.79 | 0.0202 | -2.342 | — |
Applications
Where strontium bromide is used.
Frequently Asked Questions
Common questions about strontium bromide, answered from cross-validated data.
What is SrBr2?
Strontium bromide is a stable, insulating salt composed of strontium and bromine that is primarily utilized in specialized optical and research applications.
What is SrBr2 used for?
What is the band gap of SrBr2?
Is SrBr2 a metal, semiconductor, or insulator?
Is SrBr2 thermodynamically stable?
What is the crystal structure of SrBr2?
What is the density of SrBr2?
How many polymorphs of SrBr2 are known?
What elements does SrBr2 contain?
Where does the data for SrBr2 come from?
How It Compares
As a prominent alkaline earth halide, strontium bromide represents a key reference point for understanding the structural and electronic trends within the broader family of metal halides, providing a stable baseline for comparing properties across the periodic table.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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