The MFI/sorbate structures discussed in this paper illustrate that pro
blems involved in the localization of sorbates in MFI can sometimes be
overcome. The localization of the p-dichlorobenzene and p-xylene mole
cules, obtained from energy minimizations, is close to the orientation
found from X-ray analysis. (C) 1998 Elsevier Science B.V. All rights
reserved.