Icosahedron with Inverted Spikes on all Faces
Folding instructions: Sturdy Edge Module
This is the primary page for this model.
Paper: copy paper
Type: other modular polyhedron (implies: abstract modular, abstract, balls and polyhedra, geometric, mathematical object, modular balls and polyhedra, modular, multi-sheet, other polyhedra)
Author: Michał Kosmulski
Units used: Sturdy Edge Module, by: Dirk Eisner, Francis Ow, Michał Kosmulski, other/uknown, Tomoko Fuse
Unit count: 60
In albums: Models with Dubious Classification, Modular ② — medium number of units
Compare with an octahedron built using the same technique (octahedron’s page also discusses the technique in more detail).
Just as was the case with the octahedron, I was not sure if I should classify this model under balls and polyhedra or spiky balls.