Re: lack of any dedicated powder pattern calculation software that can handle TOF Flight neutrons: Are there any Time of Flight Neutron internet/web based links giving hints and code for programming TOF capability into Rietveld and Powder Pattern calculation software. It would be far easier to convince programmers to support this form of diffraction if some easy to get "example" code and hints could be made available. Something of the ilk of the Le Bail method page which has hints on where to insert changes into Rietveld code and some example Fortran for getting over some of the nuances that may result: http://www.ccp14.ac.uk/solution/lebail/ (Telling programmers using the internet, who are not full or part time TOF users, to "read the book" could look like telling them to "go to hell" - especially as equations described in the literature may not be directly translatable into robust code) 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