> Im student researcher I need a guidelines for refinement structure double perovskite > using fullprof or other software in case to reduce Factors and than draw structures
Dear Colleague. It is difficult to reply to such a general query. You could start by reading the FullProf manual and tutorials on https://www.ill.eu/sites/fullprof/php/tutorials.html :-) The first question is the symmetry (space group). Do a google search for: https://www.google.com/webhp?q=%22double+perovskite%22+symmetry Then look in particular at the free articles on http://www.researchgate.net/ (3rd link) To search for examples of double perovskites, try http://www.ill.fr/ Log on as "demo" and search for Element=O6 and ElementCount=3 i.e. http://icsd.ill.eu/icsd/index.php?action=Search&elements=o6&elementc=3 If you then click on the formula eg Cu (Nb2 O6) the structure will be drawn using Java in a new window. (You must install Java in your browser and give it permission to run). You can download the CIF files, calculate bond lengths, draw the powder patterns etc by clicking on those buttons. I hope this will get you started, but then I suggest you join the Rietveld mailing list, which has over 1000 members who can advise you about specific problems. To join, send an email to <lists...@ill.fr> with the title: SUBSCRIBE Rietveld_L "your name and lab" With kind regards, Alan Hewat (Rietveld list manager) ______________________________________________ * Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE * <alan.he...@neutronoptics.com> +33.476.98.41.68 http://www.NeutronOptics.com/hewat ______________________________________________
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
