Frequency modulated X-ray diffraction II. Structures of multi-element disordered systems

The general theory of frequency modulated X-ray diffraction (FMXRD) described in paper I (Shevchik 1977) is applied to the problem of the determination of the structures of multi-element liquids and disordered solids. It is shown that the greatest advantage that FMXRD should have over conventional X-ray diffraction methods is that it can provide the radial distribution functions centred about particular elements in a multi-element system. Additional anticipated advantages of FMXRD are: (1) Compton scattering contributions should be negligible, and (2) electronic charge densities about particular atoms should be extractable directly from the diffraction data. It appears that the FMXRD techni que in some cases might be a more useful method for probing the local structure of particular elements than the X-ray absorption (EXAFS) technique.