Valence charge density in aluminium

Abstract
A comparison is made between the valence charge density of A1 obtained using a local on Fermi sphere potential and that derived from a suitable average potential, which takes into account the effects due to the nonlocality of the pseudopotential. The two electron distributions present significant differences, showing that a calculation of the valence charge density, which does not take account of the nonlocality of the pseudopotential, can lead to uncertain results.