Symbolic Addition and Multisolution Methods

The symbolic addition technique and the multisolution method provide general approaches to crystallographic phase determination. Crystal structures with up to about 100 atoms in the asymmetric unit are solved routinely by these methods. They do not succeed in all cases, and other chapters in this book show new lines of approach both for difficult cases and for increasing the efficiency of phase determination generally. This article is written more from the point of view of a user than from one concerned actively in the development of these methods.

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