Figure 7
(a) Anomalous diffraction pattern of the zeolite showing the effect of ionic substitution as recorded with the XPAD pixel detector. (b) Two Fourier maps of the same plane [defined by two (111) axes]: the anomalous map of the difference map (top) obtained with these data allows the inserted Sr cations to be located. These sites are mainly sites I′ and II of the standard electron density map (bottom) in which the framework is displayed. |