In a study of crystal structures, a chemist compares pure crystalline \(\text{NaCl(s)}\), in which each \(\text{Na}^+\) cation is surrounded octahedrally by \(6\) \(\text{Cl}^-\) anions, to pure crystalline \(\text{CsCl(s)}\), where \(\text{Cs}^+\) replaces \(\text{Na}^+\). The ionic radius of \(\text{Cs}^+\) (\(167\text{ pm}\)) is significantly larger than that of \(\text{Na}^+\) (\(102\text{ pm}\)). Which of the following best predicts and explains the effect of substituting \(\text{Cs}^+\) for \(\text{Na}^+\) on both the coordination number of the cation and the magnitude of the lattice energy of the crystal?