Question

Why CsCl gets converted to NaCl-type crystal lattice on heating?

Answer 1

The solution is as follows:

1. The lattice of CsCl has 8:8 coordination number.

2. When heated, the ions gain energy and start losing their compactness. This makes the coordination number drop to 6:6.

3. This makes CsCl lattice as NaCl type lattice on heating.