Sajeev, There is a lot of information like this in the GSAS Manual. Bob Von Dreele
R.B. Von Dreele IPNS Division Argonne National Laboratory Argonne, IL 60439-4814 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, June 29, 2006 11:31 AM To: rietveld_l@ill.fr Hi, I am wondering if GSAS calculates the crystal size? If not how can I calculate the crystal size? I am using a profile type 3 function (psedo voight) and obtaining the GU,GV,GW values as 0,0, 1.27 E+04 for a Pt/C phase respectively. The Chi-square fit is 2.164. Thankyou. regards, Sajeev Moorthiyedath
