Final answer:
Cesium bromide (CsBr) likely has a body-centered cubic (BCC) lattice structure similar to cesium chloride (CsCl), where Cs+ and Br- ions form an interpenetrating arrangement.
Step-by-step explanation:
The crystal structure of CsBr (cesium bromide) can be discussed by considering that of cesium chloride, CsCl, as they are chemically similar and tend to adopt the same type of crystalline arrangement. CsCl is known to form a body-centered cubic (BCC) lattice structure. In the BCC lattice, Cs+ ions are at the corners of the cube and a Cl- ion occupies the center position, or vice versa.
This can be thought of as two interpenetrating simple cubic lattices, representing a unique arrangement that maximizes the coordination of each ion, with the cations occupying octahedral holes within the anion lattice. Given the similarity between CsCl and CsBr, CsBr is likely to adopt a BCC structure as well, where the Cs+ and Br- ions are arranged in an analogous manner to CsCl.