In the LiCl structure shown in Figure 9.19, the chloride ions form a facecentered cubic...

In the LiCl structure shown in Figure 9.19, the chloride ions form a facecentered cubic unit cell 0.513 nm on an edge. The ionic radius of Cl^– is 0.181 nm.

(a) Along a cell edge, how much space is between the Cl^– ions?

(b) Would an Na1 ion (r = 0.095 nm) fit into this space? a K⁺ ion (r = 0.133 nm)?

Reference Figure 9.19: