Structures with Z '> 1 (i.e. more than one molecule in the asymmetric
unit) are of intense current interest. As part of an EPSRC funded
project, a web site has been developed concerning these fascinating
systems including an annotated database of structures with high Z '> 1 as
well as an index of useful literature.
Please visit http://www.durham.ac.uk/zprime for more details.