Rb. Neder, DIFFUSE - A PROCEDURE TO MEASURE DIFFUSE INTENSITY ON A CAD-4 DIFFRACTOMETER WITH CAD-4-EXPRESS SOFTWARE, Journal of applied crystallography, 27, 1994, pp. 845-846
An inaccuracy in the GRIDSCAN procedure, included in version 5.1 of CA
D-4-EXPRESS, is pointed out. The program presented allows interactive
and batch-type scans on a true grid in reciprocal-lattice units. Two m
easurement modes are provided: (i) calculation of all points at genera
l Eulerian angles with fixed psi for all reflections; (ii) two-circle
geometry by definition of a zone axis.