Some recent results of X-ray investigations of epitaxial layer systems are
reviewed. The interest is directed to correlation phenomena in the distribu
tion of misfit dislocations, to the coexistence of two phases of MnAs in a
large range of temperatures, to the stress relaxation in quantum wire struc
tures on InP and to the determination of phases of surface reflections. (C)
2001 Elsevier Science B.V. All rights reserved.