This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
 

=================================================================================

An example of block crystalline structures is the block structures related to the ReO₃ type, for instance, niobium oxide with block structures as shown in Figure 3351. The block structure consists of [n x m] blocks of corner sharing octahedra, which corresponds to small sections of the ReO₃ structure. These blocks in the structure are separated from each other by crystallographic shear planes in two directions, and contain edge-sharing octahedra. The adjacent blocks are either located in the same plane and connected by common edges or corners or by tetragonal sites or they are displaced in the perpendicular direction by half an octahedron diagonal.