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Input of reflection data for Fourier calculations is less accessible,
being buried in the various Fourier routines like
FOUR1Z,
FOUR1D as a
call to
FOUINP. Again an input type 0 input routine
QFOUIN is
available. The user would need to write a new QFOUIN if, say, he had
non-centrosymmetric data and was not assuming Friedel's Law. He would
have to decide what to do with Friedel pairs before presenting them to
the standard Fourier calculations, which do assume Friedel.
P.J. Brown - Institut Laue Langevin, Grenoble, FRANCE. e-mail brown@ill.fr