What Is The Structure Of Silver Dibromide?

Silver dibromide (AgBr2) is an inorganic compound that consists of one silver cation (Ag+) and two bromide anions (Br-) held together by ionic bonds. The structure of AgBr2 can be described as a three-dimensional lattice structure with the silver ions occupying the interstitial sites between the bromide ions.

Each silver ion is surrounded by six bromide ions, and each bromide ion is surrounded by six silver ions, forming a coordination polyhedron around each ion. The arrangement of the silver ions and bromide ions in the lattice results in a cubic crystal system with a space group of Fm3m.

The crystal structure of AgBr2 is similar to that of sodium chloride (NaCl), which also has a face-centered cubic structure. However, AgBr2 has a smaller lattice constant than NaCl, indicating a more compact structure. The bond distance between silver and bromine atoms is approximately 2.85 Å, which is shorter than the sum of the van der Waals radii of these atoms, indicating a significant ionic interaction between them.

Overall, the structure of silver dibromide is characterized by strong ionic bonding between the silver cations and bromide anions, resulting in a highly ordered crystal lattice arrangement.