As always, not sure how much the following is common knowledge or repeating a previous announcement(?). A webpage that is worth checking out is the American Mineralogist Crystal Structure Database by Bob Downs and Paul Heese at the University of Arizona . http://www.geo.arizona.edu/xtal-cgi/test http://www.geo.arizona.edu/xtal/personal.html You can search for crystal structure information on Mineral, Author, Title, Year or Volume. Lachlan. -- Lachlan M. D. Cranswick 4th Jan - 16th March 1999 Visiting Scientist CSIRO Division of Minerals, Melbourne, Australia Tel: (613) 9545 8500 (switch) Fax: (613) 9562 8919 [EMAIL PROTECTED] Collaborative Computational Project No 14 (CCP14) for Single Crystal and Powder Diffraction Daresbury Laboratory, Warrington, WA4 4AD U.K Tel: +44-1925-603703 Fax: +44-1925-603124 E-mail: [EMAIL PROTECTED] Ext: 3703 Room C14 NEW CCP14 Web Domain (Under heavy construction): http://www.ccp14.ac.uk