Question

Consider the structure of CsCl ($8:8$ co-ordination). How many $C{s}^{\oplus }$ ions occupy the second nearest neighbour locations of a $C{s}^{\oplus }$ ion?

• A. $8$
• B. $24$
• C. $6$
• D. $16$

Answer 1

The correct option is C $6$

The next nearest neighbours of $C{s}^{+}$ ions are present at the body center of the adjacent cubes. There are 6 such cubes and hence the number of next nearest neighbours of $C{s}^{+}$ is 6.