Difold ditetraswirlchoron

The 1-bitetrahedral swirlprism is a convex isogonal polychoron that consists of 8 triangular antiprisms, 16 triangular pyramids, 24 phyllic disphenoids obtained as the convex hull of a compound of two hexadecachoron considered as a 1-tetrahedral swirlprism.

Vertex coordinates
Coordinates for the vertices of a 1-bitetrahedral swirlprism of circumradius 1, centered at the origin, are given by:
 * (0, 0, 0, ±1)
 * ($\sqrt{6}$/3, 0, $\sqrt{3}$/3, 0)
 * (-$\sqrt{6}$/3, 0, -$\sqrt{3}$/3, 0)
 * ($\sqrt{6}$/6, ±$\sqrt{2}$/2, -$\sqrt{3}$/3, 0)
 * (-$\sqrt{6}$/6, ±$\sqrt{2}$/2, $\sqrt{3}$/3, 0)
 * (0, 0, 1/2, $\sqrt{3}$/2)
 * (0, 0, -1/2, -$\sqrt{3}$/2)
 * (0, $\sqrt{6}$/3, -1/2, $\sqrt{3}$/6)
 * (0, -$\sqrt{6}$/3, 1/2, -$\sqrt{3}$/6)
 * (±$\sqrt{2}$/2, -$\sqrt{6}$/3, -1/2, $\sqrt{3}$/6)
 * (±$\sqrt{2}$/2, $\sqrt{6}$/3, 1/2, -$\sqrt{3}$/6)