Investigation of Mg-Bi Melts by Means of X-Ray- and Neutron Diffraction
Abstract Neutron diffraction experiments were done on Mg-Bi melts with eight compositions. From the measured intensities total structure factors and pair correlation functions as well as radial atomic distribution functions were calculated. The concentration dependence of the measured nearest neighbour distance and measured coordination number indicates the preference of unlike nearest neighbours within the Mg-Bi melts.The neutron-intensity curves show premaxima at q ≅ 1.6 Å-1. X-Ray diffraction experiments performed on melts with three different compositions also yield corresponding premaxima. It could be shown that the premaximum intensity from the X-Ray as well as from the neutron experiment corresponds to the assumption that the premaxima are caused by modulation of the monotonic Laue scattering.