Medial 15-4 double step prism
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|Medial 15-4 double step prism|
|File:Medial 15-4 double step prism.png|
|Cells||60 irregular tetrahedra, 30+30+30+30 phyllic disphenoids, 15 rhombic disphenoids|
|Faces||60+60+60+60+60+60 scalene triangles, 30 isosceles triangles|
|Vertex figure||15-vertex polyhedron with 26 triangles|
|Measures (edge length 1)|
|Dual||Medial 15-4 bigyrochoron|
|Abstract & topological properties|
|Symmetry||S2(I2(15)-4)×2R, order 60|
The medial 15-4 double step prism is a convex isogonal polychoron that consists of 15 rhombic disphenoids, 120 phyllic disphenoids of four kinds, and 60 irregular tetrahedra. 2 rhombic disphenoids, 16 phyllic disphenoids, and 8 irregular tetrahedra join at each vertex. It can be obtained as the convex hull of two orthogonal 15-4 step prisms.
Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1: ≈ 1:1.91303.