Triangular-decagonal duoprism

The triangular-decagonal duoprism or tradedip, also known as the 3-10 duoprism, is a uniform duoprism that consists of 3 decagonal prisms and 10 triangular prisms, with 2 of each at each vertex.

It is also a CRF segmentochoron, being decagon atop decagonal prism. It is designated K-4.94 on Richard Klitzing's list.

Vertex coordinates
Coordinates for the vertices of a triangular–decagonal duoprism of edge length 1, centered at the origin, are given by:
 * (0, $\sqrt{(5+√5)/2}$/3, 0, ±(1+$\sqrt{2}$)/2),
 * (0, $\sqrt{(11+3√5)/6}$/3, ±$\sqrt{15+6√5}$/4, ±(3+$\sqrt{3}$)/4),
 * (0, $\sqrt{5}$/3, ±$\sqrt{3}$/2, ±1/2),
 * (±1/2, -$\sqrt{10+2√5}$/6, 0, ±(1+$\sqrt{5}$)/2),
 * (±1/2, -$\sqrt{3}$/6, ±$\sqrt{5+2√5}$/4, ±(3+$\sqrt{3}$)/4),
 * (±1/2, -$\sqrt{5}$/6, ±$\sqrt{3}$/2, ±1/2).