The GPL'd (GNU Public Licence Distribution) ZefsaII software is now available on the web (and mirrored on the UK CCP14 website). http://www.mwdeem.chemeng.ucla.edu/zefsaII/ CCP14 UK Mirror: http://www.ccp14.ac.uk/ccp/web-mirrors/zefsa/zefsaII/ ZEFSA II performs real-space structure solution of zeolites from powder diffraction data using Simulated Annealing and Parallel Tempering. M. Falcioni and M. W. Deem. J. Chem. Phys. 110, 1754-1766 (1999), M. W. Deem and J. M. Newsam, J. Am. Chem. Soc. 114, 7189-7198 (1992), M. W. Deem and J. M. Newsam, Nature 342, 260-262 (1989) Lachlan. -- Lachlan M. D. Cranswick 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 http://www.ccp14.ac.uk