Point group D3h

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In crystallography, a crystallographic point group is a set of symmetry operations, such as rotations or reflections, that keep a central point in place while moving other directions and faces of the crystal to positions occupied by features of the same kind. https://en.wikipedia.org/wiki/Crystallographic_point_group This model uses dual extrusion. The crystal structure has a hexagonal cell. It is classified with Schoenflies notation: D3h, Hermann–Mauguin notation: −6m2, and Orbifold: *322. OpenSCAD files are included to make custom cells. Further information can be found at: https://www.staff.ncl.ac.uk/j.p.goss/symmetry/D3h.html