ReX is a powder diffraction analysis software based on the Rietveld method, providing a user-friendly environment to perform quantitative evaluation of powder data. ReX offers a flexible parameter-based architecture for the optimization of structural and microstructural related quantities, coupled with an intuitive and modern user interface; specifically oriented to beginners and non-specialist, can also be used by expert powder diffractionists in addition to more specialized packages.
You can get the latest ReX version from the download page – the documentation is still a work in progress but already includes some useful tutorials.
If you find ReX useful for your research work, please cite the following reference:
M. Bortolotti, L. Lutterotti and I. Lonardelli, ReX: a computer program for structural analysis using powder diffraction data, J. Appl. Cryst. (2009). 42, 538-539, doi:10.1107/S0021889809008309