Beware!

The structure data on the following pages will
download quickly even over a 28K modem. However if your computer is slow, it could take quite a long time (up to 9 minutes for the packing diagrams) for the preparatory calculations to be completed for the rotations. The larger structures are recommended for viewing only on PC's with a Pentium-II or better or i-Macs (or users with considerable patience). Internet Explorer does not reliably get the background color (gray) correct in the rotation applet (thus hydrogens blend into the white background). Netscape is strongly recommended for better viewing.

If you receive a browser message stating that "something.class" was not found or could not be downloaded then you have a firewall preventing you from accessing the data.