Answer:
The answers are given below.
Explanation:
a)In the rock salt or NaCl, six sodium ions surrounds each chloride ions so the coordination number for NaCl is 6. It means there are 6 anions around each cations.
In CsCl, each Cl ion is surrounded by 8 cesium ions, which means there are 8 anions surrounding 8 cations. The coordination number is 8 for CsCl.
b) The ideal radius of both the structures are
We can answer this by considering the ideal radius ratio's of both structures, that is r+ /r– = 0.414 for rock salt and 0.732 for CsCl. Since the anion is the same, so the cation radius will "seem" larger in the CsCl structure type.
