Input of Fourier Data

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.