Acronym	starpglass
Name	pentagrammic retroprismatic hourglass
Circumradius	1/sqrt(2) = 0.707107
Face vector	10, 15, 7
Confer	uniform relative: starp   stip

As abstract polytope it is equivalent to the pentagrammic prism: in fact that one uses a reflection plane orthogonal to its axis, while this one uses a point reflection there instead. As such it reuses the symmetry of the pentagrammic retroprism but still the incidences of the pentagrammic prism.

Measurings are taken here so that the hemifaces are bowties with sequence xq(-x)q.

Incidence matrix

higher (x5/2o || o5/2x)-faceting   → height = sqrt[2/sqrt(5)] = 0.945742

10 |  2 1 | 2 1
---+------+----
 2 | 10 * | 1 1  x
 2 |  * 5 | 2 0  q
---+------+----
 4 |  2 2 | 5 *  xq(-x)q
 5 |  5 0 | * 2  {5/2}