The Anatomy of Bragg Reflections from Small Single Crystals

Abstract

Abstract In the two-dimensional δω,δ2θ representation of equatorial diffraction space, the various components which combine to generate the shapes of Bragg reflections from small single crystals are “unfolded” and can be identified and their (angular) magnitude estimated. The relation of different scan procedures is clarified by use of this form of representation. The advantage of δω,δ2θ representation over reciprocal space representation for the intercomparison of Bragg reflections is demonstrated. Some applications of δω,δ2θ diffraction space are treated. The wavelength dispersion interaction between a monochromator crystal and a small specimen crystal in δω,δ2θ space is discussed, particularly for the case where their planes of diffraction are parallel.