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A part that has been adapted from a review article in "Physics of the Solid State".
A major classification approach by the authors is made by "opening" several main windows in which they show the relation of a main window-title structure to the perovskite structure and then build more detailed relations between different sub-entries.
A brief discussion of the hexagonal perovskites and possible polytypes.
The relations to the closest packing of spheres, the different possible arrangemements and the connection of the octahedra to from 3D-networks are demosntrated. Additionally, some examples are given.
Concepts to understand and name the perovskite polytypes.
In continuation of the previous section on the polytypes, the theoretical (and therfore more abstract) concepts to understand and describe their stacking are summarized in this section.
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