The four most-simple pentagonal structures each opening possibilities for quantum fluctuations:
1. Five-tetrahedral gap (sharing a common centerpoint and one shared edge). Also see: Pentastar
2. Five-octahedral gap (share a single center point, each shares at least a face with one other).
3. Icosahedron: Twenty tetrahedrons share a common centerpoint.
4. Pentakis Dodecahedron: Twelve groups of pentastars (five tetrahedrons) enclosed a cavity.
The emergence of a simple pentagonal structure of octahedrons. The red line is a ridge line. It is on either side of this object, a centerpoint is shared by every object. It is a pivotal object within this domain.

Also, another look at the pentastar, octahedron, tetrahedron, sphere, geometries and the geometry of geometry.