Ag2Br2O2Pb2
Ag2Br2O2Pb2 is a metastable semiconducting compound consisting of silver, lead, bromine, and oxygen atoms.
About Ag2Br2O2Pb2
Ag2Br2O2Pb2 is a complex quaternary compound composed of silver, lead, bromine, and oxygen. As a semiconducting material, it exhibits electronic properties that bridge the gap between traditional insulators and conductors, making it a subject of interest for fundamental materials research.
Due to its metastable nature, this compound represents a delicate balance of chemical bonding that requires specific synthesis conditions to stabilize. Its existence within multiple structural databases highlights its significance as a distinct phase in the broader landscape of inorganic halide-oxide materials.
Key Properties
Cross-validated computational properties for Ag2Br2O2Pb2, 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 Ag2Br2O2Pb2, 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. |
|---|---|---|---|---|---|
| P4/nmm (No. 129) | tetragonal | 0.19 | 0.0626 | -4.292 | 5.91 |
| P4/nmm (No. 129) | — | — | — | — | — |
| — | — | — | — | — | 5.80 |
Applications
Where Ag2Br2O2Pb2 is used.
Frequently Asked Questions
Common questions about Ag2Br2O2Pb2, answered from cross-validated data.
What is Ag2Br2O2Pb2?
Ag2Br2O2Pb2 is a metastable semiconducting compound consisting of silver, lead, bromine, and oxygen atoms.
What is Ag2Br2O2Pb2 used for?
What is the band gap of Ag2Br2O2Pb2?
Is Ag2Br2O2Pb2 a metal, semiconductor, or insulator?
Is Ag2Br2O2Pb2 thermodynamically stable?
What is the crystal structure of Ag2Br2O2Pb2?
What is the density of Ag2Br2O2Pb2?
How many polymorphs of Ag2Br2O2Pb2 are known?
What elements does Ag2Br2O2Pb2 contain?
Where does the data for Ag2Br2O2Pb2 come from?
How It Compares
As a unique quaternary phase, this compound occupies a specialized niche in materials science where silver-lead halide-oxide systems are explored for their potential electronic and optical functionalities. Unlike more common binary or ternary oxides, this material demonstrates the complex interplay of heavy metal cations and halide anions in forming intricate, metastable lattice arrangements.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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