Structure Importing, Conversion and Transformation
Summary list of available software at: http://www.ccp14.ac.uk/solution/structconv/
Be careful to check the results
Best program for the moment is the shareware Cryscon
- http://www.shapesoftware.com
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Other software such as GUI WinORTEP can import a wide variety of file formats and export these into Shelx format.
http://www.chem.gla.ac.uk/~louis/software/ortep3/
Example of Cryscon for Windows by Eric Dowty