Question

In the Wikipedia article "Born–Huang approximation" it is stated that this adiabatic approximation gives an upper bound for the ground-state energy, referencing Born, M.; Kun, H.Dynamical Theory of Crystal Lattices; Oxford University Press, 1954. I do not have access to this book and I could not find any resources on this particular subject. Could anyone show me how the adiabatic approximation gives an upper bound for the ground-state energy or direct me to a resource that does?

Answer 1

The Born-Haber cycle is a method used to estimate the lattice energy of a crystalline ionic compound by breaking down its formation into a series of individual steps. By summing up the energy changes in each step of the cycle, the lattice energy can be calculated.

Step-by-step explanation:

The Born-Haber cycle is a method used to estimate the lattice energy of a crystalline ionic compound. The Born-Haber cycle is a method used to estimate the lattice energy of a crystalline ionic compound by breaking down its formation into a series of individual steps. By summing up the energy changes in each step of the cycle, the lattice energy can be calculated.

It breaks down the formation of the ionic solid into a series of individual steps, each with a known energy change. The lattice energy can be calculated by summing up the energy changes in each step of the cycle. For example, in the equation AHlattice = 76.5 + 79.4 + 375.7 + (-328.2) - (-553.5), the lattice energy of the compound is estimated to be 756.9 kJ/mol.