CRYSTAN is a crystallographic program system for minicomputers written in FORTRAN IV language. We choose this system because it may be divided in five nearly independent blocks and is easy to handle. The blocks FOURIER procedures and least squares refinement and a large part of data handling have been implemented on the IRIS 55 computer at the CIRIA of Tunis. We describe in this work some special features in handling this system on this computer and some test examples.
M. Abene, A. Yacoubi, A. Bizid, A. Kallel