H21(1).mp4

Animations, videos and 3D models for teaching space-group symmetry

The video dv5020sup5.mp4 shows the "action of symmetry operations on the asymmetric unit," specifically how the atoms move, rotate, or translate. Key Concepts Illustrated in the Video H21(1).mp4

Zn ions, for example, are located directly on the rotation axis. Animations, videos and 3D models for teaching space-group

The minimum structural unit (the dimer) that, when acted upon by space group symmetry operations, generates the full crystal structure. " specifically how the atoms move

These spheroids pack in a hexagonal system (rhombohedral shape) to form a crystal. The packing creates a "threefold symmetry axis" (Zn ions).

Three of these dimer units are arranged around a threefold rotation axis to form a hexamer, which takes the shape of an oblate spheroid.