Hi Nrutya ,
GSAS comes packed with some "generic" instrument parameter files that are located in the ~/ GSAS /examples/ directory. These files can be opened/edited with a simple text editor to match your instrument specifications. If you are using EXPGUI when you launch GSAS, you can load one of these generic files and then edit the file using EXPGUI and it will save the file in the appropriate format for you. I start with the inst_x3a.prm as a template and adjust it accordingly when using a laboratory diffractometer. Hope this helps, Benjamin Greve ----- Original Message ----- From: " nrutya gopi " < nrutyagopi @ gmail .com> To: " rietveld l" < rietveld _...@ill.fr> Sent: Saturday, January 10, 2009 12:40:17 AM GMT -05:00 US/Canada Eastern Subject: instrument file hi... i, ve jus started learning the rietveld method.. and am using gsas ... i wanted to know how to prepare an instrument file