Question A quantitative theory of bonding in ionic crystal was developed by Born and Meyer along the following the lines: the total force of the system is taken to be: ae² V-N 7-72 4πεor² F(r) = N- where N is the number of positive - negative ion pairs, A and n are constants determined from experiment and a the Madelung constant which depends on the crystal structure of the solid. 1. Derive an expression of the total potential energy of the ionic crystal and identify the repulsion and the attraction terms. 2. Derive an expression of the equilibrium interatomic distance ro. 3. Derive an expression of the bonding energy U(ro).
Question A quantitative theory of bonding in ionic crystal was developed by Born and Meyer along the following the lines: the total force of the system is taken to be: ae² V-N 7-72 4πεor² F(r) = N- where N is the number of positive - negative ion pairs, A and n are constants determined from experiment and a the Madelung constant which depends on the crystal structure of the solid. 1. Derive an expression of the total potential energy of the ionic crystal and identify the repulsion and the attraction terms. 2. Derive an expression of the equilibrium interatomic distance ro. 3. Derive an expression of the bonding energy U(ro).
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