Abstract
A detailed description of the procedures utilized in the nonroutine
X-ray single-crystal structural determination and
refinement of a pseudo-merohedrally twinned crystal of an
Fe/Ni organometallic complex is presented. It illustrates to the
practitioners of crystallography how to properly handle such
cases and describes the logic and concrete steps necessary to
account for the twinning, pseudo-symmetry and atomic
positional disorder.