🤓 Based on our data, we think this question is relevant for Professor Welden's class at Evergreen Valley College.
We are asked to use ionic radii, Cs+ (r=1.81) and I- (r=2.06), to predict with which structure CsI will crystallize.
We are given:
ionic radii of Cs+ (r) = 1.81
ionic radii of I- (r) = 2.06
The given ions are expected to form CsI.
The structures of CsCl, NaCl, and ZnS. Each structure type can be generated by the combination of a two-atom motif and the appropriate lattice.
CuI, CsI, and NaI each adopt a different type of structure. The three different structures are those shown in the following figure.
Use ionic radii, Cs+ (r=1.81) and I- (r=2.06), to predict with which structure CsI will crystallize.