Just in case anyone is interested, there is now a program available to extract/convert the information held in GSAS Fourier Map files called FOUE. FOUE can currently convert GSAS Fourier map files into ASCII, WinGX, Marching Cubes and Project XD Fourier map formats. The source code is released under the GNU Public License and there is also a Windows/Intel executable available. FOUE can be obtained from the CCP14 web site at: http://www.ccp14.ac.uk/ccp/web-mirrors/scott-belmonte-software Thanks to Lachlan Cranswick for letting me use the CCP14 site to host the software. Also available is an updated version of PATE (GSAS pattern extraction for outputing observed, calulated and difference plots with reflection positions in an ASCII form useful for inputing into third party graphing software). A couple of bugs have been fixed which meant the PATE sometimes had problems reading GSAS UNIX *.EXE files. Useful links provided by Lachlan: Foue Tutorial Runthrough page: http://www.ccp14.ac.uk/solution/gsas/viewing_fourier_maps.html Marching Cubes for Windows: http://mysak.umbr.cas.cz/~husakm/Public/MarchingCubeELD/MarchingCubeELD.htm CCP14 Tutorial and mirrors information: http://www.ccp14.ac.uk/tutorial/marchingcube/ WinGX and Mapview for Windows: http://www.chem.gla.ac.uk/~louis/software/ CCP14 Tutorial and mirrors information: http://www.ccp14.ac.uk/tutorial/wingx/ Scott. --------------------------------------------------------------------- Dr Scott A. Belmonte e-mail: [EMAIL PROTECTED] University of Edinburgh Tel: 01925 603639 Room C18A Fax: 01925 603124 Daresbury Laboratory, Daresbury Warrington WA4 4AD ---------------------------------------------------------------------