Answer
Cesium chloride has the higher melting point because its coordination number is higher than that of silver iodide
Work Step by Step
In cesium chloride, one anion forms bonds with 8 anions, and vice versa. But in silver iodide, one anion bonds with only 4 cations. So, since the coordination number in cesium chloride is higher, it has a higher melting point than silver iodide
