Which compound is most likely to crystallize in the zinc blende structure?
(a) RbCl (Rb+ radius = 148 pm; Cl– radius = 181 pm)
(b) MgCl2 (Mg2+ = radius 65 pm; Cl– radius = 181 pm)
(c) CuI (Cu+ radius = 96 pm; I– radius = 216 pm)
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