This shows a five-directional space frame with section planes. There is a polar axis that is normal to all the section planes. The whole frame is dissected into 2 types of rhomb, one more prolate the other more oblate. One of each are shown as pulled out from the array, with planes intersecting them as triangles of 2 types. These are so-called Robinson triangles, that compose one type of Penrose Tiling There is a one to one correspondence between rhombs in the dissection and triangles in the tiling. Thus this array, composed of 2 types of cell, can be seen as aperiodic tiling of space.
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