Projection of crystal structure of corundum

GIF movies have been made with VESTA3 (Momma & Izumi, 2011), AppleScript code, and Adobe Photoshop.

Movie 1. Projection of crystal structure (hexagonal setting)

Movie 2. Projection of crystal structure (rhombohedral setting)

Movie 3. Electron density for a conventional neutral atom model, Al⁰₂O⁰₃