Lattice Enthalpies and the Born-Haber Cycle

TABLE 12.2 Geometrical Madelung constants for several ionic lattice types.  

TABLE 12.3 Born compressibility factors (based on the electron  

Potential energy diagram for the lattice energy of an ionic solid, showing the attractive (coul) and repulsive (rep) components as dotted and dashed lines, respectively. 

Combining terms, we obtain the Born-Lande equation  

Example 12-2. Calculate the lattice energy for NaCI using Equation (12.6) if the length of a unit cell edge is 566 pm. Assume that the Na and Cl ions touch each other along each edge in a hard-spheres-type model. 

---