Square-heptagrammic duoprism

The square-heptagrammic duoprism, also known as sashedip or the 4-7/2 duoprism, is a uniform duoprism that consists of 7 cubes and 4 heptagrammic prisms, with 2 of each at each vertex.

The name can also refer to the square-great heptagrammic duoprism.

Vertex coordinates
The coordinates of a square-heptagrammic duoprism, centered at the origin and with edge length 2sin(2π/7), are given by: where j = 2, 4, 6.
 * $$\left(±\sin\frac{2\pi}7,\,±\sin\frac{2\pi}7,\,1,\,0\right),$$
 * $$\left(±\sin\frac{2\pi}7,\,±\sin\frac{2\pi}7,\,\cos\left(\frac{j\pi}7\right),\,±\sin\left(\frac{j\pi}7\right)\right),$$

Representations
A square-heptagrammic duoprism has the following Coxeter diagrams:
 * x4o x7/2o (full symmetry)
 * x x x7/2o (I2(7)×A1×A1 symmetry, heptagrammic prismatic prism)