NaCl Unit Cell The radii of the ions is: r Na+ = 0.95 Å and r Cl- = 1.81 Å. Since the sodium ion is 52.5% the size of the chloride ion, we can predict that the chloride ions will occupy the lattice ...

The diagram shows both a unit cell with ion locations indicated (a) and a space filling model (b) of ionic hard spheres. The cohesive energy of NaCl is - 7.90 eV, with a Coulomb contribution of -8.85 ...