P.S. I use BGMN on a regular basis during my doctoral studies, mostly for the quantification of clays (bentonite) and carbonates. It is a great and easy to understand programm used especially by people from clay science. Though it can just as well be used to work on any other kind of material.
This is the course description from the cicurlar:
This workshop is addressed at persons using the BGMN Rietveld program in research and education. Basic knowledge in X-ray powder diffraction is assumed. The content focuses on the use of laboratory powder diffractometers and the application of BGMN in phase analysis.
Examples in the tutorials are mainly from minerals and rocks.
Computer exercises will be performed on the participants’ own laptop computers. The BGMN and Profex software are under GNU GPL and will be distributed for free. Versions for Windows and Mac OS X systems will be available. Copies of the presentations will be distributed as PDF files. Participation is limited to 20 persons and will be decided by the organizers on a first-come-first-served basis. Individual confirmation will be sent after the pre-registration deadline