Triangular triswirlprism

The triangular triswirlprism is a convex isogonal polychoron that consists of 18 triangular antiprisms and 54 phyllic disphenoids obtained as a subsymmetrical faceting of the enneagonal duoprism.

Vertex coordinates
Coordinates for the vertices of a triangular triswirlprism constructed as the convex hull of three triangular duoprisms of edge length 1, are given as Cartesian products of the vertices of triangle T 1:
 * T 1 × T 1,
 * T 2 × T 2 (T 1 rotated 40 degrees),
 * T 3 × T 3 (T 1 rotated 80 degrees).