Dear All, After the final fitting in Artemis, we get the (i) total error; (ii) the final value of the parameters; (iii) the error in the parameters as well as (iv) the dependencies among the parameters. What is kind of logic used in Artemis to calculate these values? Is it Genetic optimization procedure used in this process? Can anyone help me by giving some references. I was going through the old posts and found two posts. One is this one: http://cars9.uchicago.edu/ifeffit/FAQ/FeffitModeling and the other one mentioned in the same. I am sorry to ask for some help which is not directly related to the XAFS. Thanks in advance. With regards, Pralay. --- Research Student. Solid State and Structural Chemistry Unit Indian Institute of Science Bangalore 560012 INDIA