Many full time and part time crystallographers are content in using a very limited set of analytical software. However, the option of applying other programs may assist in resolving stubborn problems involving non-typical structures. There is a wide variety of independent crystallographic software for single crystal and powder diffraction that is freely available off the internet. This includes a range of peak profiling, powder indexing, unitcell refinement, single crystal structure solution, single crystal refinement, Rietveld refinement, structure checking, and visualization programs. As scientists are most at risk of "not knowing that they do not know", this presentations will quickly go through the various software options available to hopefully interest crystallographers in taking the time to look around at the range of available crystallographic software programs. Matching crystallographic software to the problem at hand can assist in overcoming what might seem the insolvable when using a limited suite of programs.
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Luca Lutterotti (2000) studied this question.