The Cambridge Crystallography Subroutine Library

The Cambridge Crystallography Subroutine Library (CCSL) is a versatile set of subroutines which will have many different applications for non-standard crystallography. At present it is used extensively at the Institut Laue–Langevin for interpreting all polarized neutron measurements, proceeding from the raw flipping-ratio measurements to the final production of spin-density maps. It is also used to analyse simple magnetic and more complicated nuclear structures, and for more general crystallographic applications such as arranging lists of reflections into groups of symmetry equivalents. It finds applications in the analysis of neutron powder diffraction patterns, as well as in more recent developments for the analysis of X-ray powder diffraction photographs.