The energetics of ionic compounds is studied in terms of both a Born–Haber cycle and an electrostatic model. The individual terms of the Born–Haber cycle and their measurement are discussed in detail. The Madelung constant is presented, together with a note on series convergence. Applications of cohesive energies are discussed. Crystal chemistry is introduced through Bragg’s early x-ray measurements on the alkali halides. Ionic solids of the types MX and MX2 and the effect of polarization on them are discussed. Solubility relationships of ionic solids are discussed in terms of energetics. A section is devoted to defect structures, and the physical and structural properties of ionic solids are presented.
Keywords: Ionic compounds, Born–Haber cycle, Madelung constant, calculations of cohesive energies and their applications, crystal chemistry, MX and MX2 compounds, silicates, radius ratio, solubility, defect structures
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