POLISH: computer program for improving the accuracy of structure-factor magnitudes obtained from powder data

A computer program, POLISH, is presented that improves the accuracy of the structure-factor magnitudes obtained from powder data. This offers a greater likelihood of success for structure determination by direct methods or Patterson techniques. Generally, the program will be used in conjunction with a unit-cell refinement program, but it may also be used independently. Accurate values of the unit-cell and peak-shape parameters are required, which may be conveniently obtained from the unit-cell-refinement program. The program is tested by application to ND₄NO₃ (V).