This is an atomic sturcture of rutile. The rutile-type structure is adopted by various dioxides, such as TiO2 (photocatalyst), GeO2, high-pressure SiO2, etc.

in each octahedron, a cation atom (e.g. Ti) is located at the center and six oxygen atoms are at the vertices.

By printing this model, you can understand the characteristics of rutile type-structure such as:

• octahedra share horizontal edges,
• octahedra of neighboring chains share its vertices,
• there are space along c-axis (veritical line).

The stl file is made by Blender with a self-made python script.

This model was printed with a Cube 3 printer without automatic supporting materials.