1983 年 16 巻 Special 号 p. 99-108
Abstract In view of the importance of multiple diffraction effects in X-ray and neutron diffractions, which may cause misunderstanding for the space group determinationss or intensity measurements, the geometry of the phenomena has been reviewed in a summarized form. As examples, the Umweganregung peaks for pyroxene and enargite observed for the φ-azimuth were indexed by operative and cooperative reflections.