19 | | The GSAS manual is included with the distributions of the GSAS programs (see above) or can be downloaded [https://subversion.xor.aps.anl.gov/EXPGUI/gsas/all/GSAS%20Manual.pdf here] . It is a ~230 page PDF file (1.7Mb) that contains three sections: tutorials, mathematical basis & file structures. Every GSAS user should take the time to read the "mathematical basis" section (pages 125-179 in 1/19/01 version)! The manual can also be found on-line: http://www.ccp14.ac.uk/ccp/ccp14/ftp-mirror/gsas/public/gsas/manual/GSASManual.pdf The manual is what you should cite when publishing a structure refined with GSAS [and of course you will cite it: A.C. Larson and R.B. Von Dreele, "General Structure Analysis System (GSAS)", Los Alamos National Laboratory Report LAUR 86-748 (2000).] |