A transmission electron microscopy study of cristobalite

Abstract

The results of a transmission electron microscope (TEM) study of both the high-and low-forms of cristobalite as well as of the phase transition between them are presented. Both high-and low-forms are found to exhibit intense, closely related diffuse intensity distributions. The microstructure of the α-(or low-) form includes both tetragonal twin variants as well as a characteristic array of striations corresponding to planar boundaries. Satellite dark field imaging rules out the possibility that these are simple displacement faults. Show more