Triangular-hexagonal duoprism

The triangular-hexagonal duoprism or thiddip, also known as the 3-6 duoprism, is a uniform duoprism that consists of 3 hexagonal prisms and 6 triangular prisms, with two of each meeting at each vertex.

The convex hull of two orthogonal 3-6 duoprisms is the triangular duoexpandoprism.

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