International Union of Crystallography. Commission on Crystallographic Apparatus and Commission on Charge, Spin and Momentum Densities. Extinction corrections: theory and experiment. Results of -ray diffractometry
Abstract
The difficulties in relating any diffraction theory to the defect structure of 'real crystals' used in crystallography are discussed qualitatively and it is shown that most of these problems become less severe in structure factor measurements by means of -ray diffractometry. Probably more direct information on the defect structure of the samples used in accurate diffraction experiments is needed in order to improve the situation. At present and probably for the near future it seems best to design experiments where extinction is only of the order of 10% or less.