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Introduction

Users' input to CCSL comes in two main types. One is a crystallographic data file , or Crystal Data for short, which is required by most CCSL jobs. Various other input files may contain, say, reflection data for the Fourier routines, or profile intensity data, in fact, any other set of data which the user wants to be read by CCSL.

In this chapter we first describe the Crystal Data. Then, because the file is interpreted by CCSL and not directly by FORTRAN, the routines which do this are introduced in some detail. Anyone wishing to write CCSL programs should find these routines useful. Details of exactly what is on the Crystal Data cards are given at the end of the chapter, in alphabetical order.

Other types of data input are described in Chapter 4.



P.J. Brown - Institut Laue Langevin, Grenoble, FRANCE. e-mail brown@ill.fr