AgBr
Silver bromide · Bromargyrite
Silver bromide is a stable, light-sensitive semiconductor compound traditionally used in photographic processes.
About Silver bromide
Silver bromide is a stable, semiconducting inorganic compound composed of silver and bromine. Its ability to respond to electromagnetic radiation makes it a foundational material in the study of light-matter interactions and solid-state chemistry. The compound is highly regarded for its structural predictability and reliability in chemical synthesis. Due to its position on the convex hull, it remains a robust subject for researchers investigating electronic and optical properties in binary halides. It is primarily utilized in specialized imaging technologies and remains a benchmark material for understanding halide-based semiconductor behavior.
Key Properties
Cross-validated computational properties for Silver bromide, aggregated across 6 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 AgBr. 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 AgBr, 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 | 0.73 | 0.0000 | -2.900 | 6.44 |
| Pmmn (No. 59) | orthorhombic | 1.24 | 0.0003 | -2.899 | 6.44 |
| F-43m (No. 216) | cubic | 1.17 | 0.0305 | -2.869 | 5.13 |
| P21/m (No. 11) | monoclinic | 0.70 | 0.0720 | -2.828 | 6.25 |
| Pm-3m (No. 221) | cubic | 0.12 | 0.2521 | -2.647 | 6.66 |
| Fm-3m (No. 225) | — | 0.38 | — | — | — |
| No. 0 | unknown | — | — | — | 3.74 |
| No. 0 | unknown | — | — | — | 3.78 |
| No. 0 | unknown | — | — | — | 1.81 |
| No. 0 | unknown | — | — | — | 1.74 |
| No. 0 | unknown | — | — | — | 1.85 |
| No. 0 | unknown | — | — | — | 1.67 |
Applications
Where Silver bromide is used.
Frequently Asked Questions
Common questions about Silver bromide, answered from cross-validated data.
What is AgBr?
Silver bromide is a stable, light-sensitive semiconductor compound traditionally used in photographic processes.
What is AgBr used for?
What is the band gap of AgBr?
Is AgBr a metal, semiconductor, or insulator?
Is AgBr thermodynamically stable?
What is the crystal structure of AgBr?
What is the density of AgBr?
How many polymorphs of AgBr are known?
What elements does AgBr contain?
Where does the data for AgBr come from?
How It Compares
As a prominent binary halide, silver bromide serves as a primary reference point for investigating the electronic properties of silver-based compounds. Its high structural stability and well-documented behavior make it a standard against which other light-sensitive halide materials are measured in both academic and industrial research.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- nomad — Data from NOMAD. Cite: Draxl & Scheffler, J. Phys. Mater. 2, 036001 (2019).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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