Weaire–Phelan building blocks

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The Weaire-Phelan structure is a minimum surface foam or honeycomb arrangement. For more information, visit https://en.wikipedia.org/wiki/Weaire%E2%80%93Phelan_structure. The Weaire-Phelan structure is derived from the unit cell of the A15 structure. To learn more about this, go to https://en.wikipedia.org/wiki/A15_phases. The A15 structure type can be found at https://de.wikipedia.org/wiki/Strukturtyp. Notable compounds of the A15 structure include Cr3Si and Nb3Sn. In its assembled state, the pyritohedrons never come into contact with each other. In fact, they can be omitted altogether when printing the Weaire-Phelan structure. The truncated hexagonal trapezohedrons hold together on their own, forming voids in the process. A pyritohedron is a pentagondodekaeder, as depicted at https://commons.wikimedia.org/wiki/File:Pentagondodekaeder.svg and https://commons.wikimedia.org/wiki/File:Pyritohedron.png. For more information on truncated hexagonal trapezohedrons, visit https://en.wikipedia.org/wiki/Truncated_hexagonal_trapezohedron.