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2.1 Basics of Structures


                 Visualization of structures








                                                    Example: Cristobalite (SiO )
                                                                                                                 2





                    Description of packing





                                                                Description of environment







                                                                                                                Description of topology




                     Bragg jun. (1920)
                      Sphere packing

                                                                       Pauling (1928)

                                                                           Polyhedra




                                                                                                                       Wells (1954)
                                                                                                                           3D nets
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