x5/2o  x5/2x	-- stacu
        
        
x5/2o  x5/2x	-- stacu

  |      +- 2pip
  +-------- stip

This segmentochoron provides a Grünbaumian bottom base.

As abstract polytope stacupe is isomorphic to pecupe, thereby replacing the pentagram by a pentagon and the {10/2} by a decagon, resp. stacu by pecu.

Incidence matrix according to Dynkin symbol

xx5/2ox xx&#x     → height = sqrt((5+sqrt(5))/10) = 0.850651
(stip || 2pip)

o.5/2o. o.    | 10  * |  2 1  2  0  0  0 | 1 2  2  1  2 0 0 0 | 1 1 2 1 0
.o5/2.o .o    |  * 20 |  0 0  1  1  1  1 | 0 0  1  1  1 1 1 1 | 0 1 1 1 1
--------------+-------+------------------+--------------------+----------
x.   .. ..    |  2  0 | 10 *  *  *  *  * | 1 1  1  0  0 0 0 0 | 1 1 1 0 0
..   .. x.    |  2  0 |  * 5  *  *  *  * | 0 2  0  0  2 0 0 0 | 1 0 2 1 0
oo5/2oo oo&#x |  1  1 |  * * 20  *  *  * | 0 0  1  1  1 0 0 0 | 0 1 1 1 0
.x   .. ..    |  0  2 |  * *  * 10  *  * | 0 0  1  0  0 1 1 0 | 0 1 1 0 1
..   .x ..    |  0  2 |  * *  *  * 10  * | 0 0  0  1  0 1 0 1 | 0 1 0 1 1
..   .. .x    |  0  2 |  * *  *  *  * 10 | 0 0  0  0  1 0 1 1 | 0 0 1 1 1
--------------+-------+------------------+--------------------+----------
x.5/2o. ..    |  5  0 |  5 0  0  0  0  0 | 2 *  *  *  * * * * | 1 1 0 0 0
x.   .. x.    |  4  0 |  2 2  0  0  0  0 | * 5  *  *  * * * * | 1 0 1 0 0
xx   .. ..&#x |  2  2 |  1 0  2  1  0  0 | * * 10  *  * * * * | 0 1 1 0 0
..   ox ..&#x |  1  2 |  0 0  2  0  1  0 | * *  * 10  * * * * | 0 1 0 1 0
..   .. xx&#x |  2  2 |  0 1  2  0  0  1 | * *  *  * 10 * * * | 0 0 1 1 0
.x5/2.x ..    |  0 10 |  0 0  0  5  5  0 | * *  *  *  * 2 * * | 0 1 0 0 1
.x   .. .x    |  0  4 |  0 0  0  2  0  2 | * *  *  *  * * 5 * | 0 0 1 0 1
..   .x .x    |  0  4 |  0 0  0  0  2  2 | * *  *  *  * * * 5 | 0 0 0 1 1
--------------+-------+------------------+--------------------+----------
x.5/2o. x.    ♦ 10  0 | 10 5  0  0  0  0 | 2 5  0  0  0 0 0 0 | 1 * * * *
xx5/2ox ..&#x ♦  5 10 |  5 0 10  5  5  0 | 1 0  5  5  0 1 0 0 | * 2 * * *
xx   .. xx&#x ♦  4  4 |  2 2  4  2  0  2 | 0 1  2  0  2 0 1 0 | * * 5 * *
..   ox xx&#x ♦  2  4 |  0 1  4  0  2  2 | 0 0  0  2  2 0 0 1 | * * * 5 *
.x5/2.x .x    ♦  0 20 |  0 0  0 10 10 10 | 0 0  0  0  0 2 5 5 | * * * * 1

xx5/2ox&#x || xx5/2ox&#x   → height = 1
(stacu || stacu)

o.5/2o.    || ..   ..    | 5  * *  * | 2  2 1 0 0  0 0  0 0 0 | 1 2 1 2  2 0 0 0 0 0 0 0 | 1 1 2 1 0 0
.o5/2.o    || ..   ..    | * 10 *  * | 0  1 0 1 1  1 0  0 0 0 | 0 1 1 0  1 1 1 1 0 0 0 0 | 1 0 1 1 1 0
..   ..    || o.5/2o.    | *  * 5  * | 0  0 1 0 0  0 2  2 0 0 | 0 0 0 2  2 0 0 0 1 2 1 0 | 0 1 2 1 0 1
..   ..    || .o5/2.o    | *  * * 10 | 0  0 0 0 0  1 0  1 1 1 | 0 0 0 0  1 0 1 1 0 1 1 1 | 0 0 1 1 1 1
-------------------------+-----------+------------------------+--------------------------+------------
x.   ..    || ..   ..    | 2  0 0  0 | 5  * * * *  * *  * * * | 1 1 0 1  0 0 0 0 0 0 0 0 | 1 1 1 0 0 0
oo5/2oo&#x || ..   ..    | 1  1 0  0 | * 10 * *  * *  * * * * | 0 1 1 0  1 0 0 0 0 0 0 0 | 1 0 1 1 0 0
o.5/2o.    || o.5/2o.    | 1  0 1  0 | *  * 5 * *  * *  * * * | 0 0 0 2  2 0 0 0 0 0 0 0 | 0 1 2 1 0 0
.x   ..    || ..   ..    | 0  2 0  0 | *  * * 5 *  * *  * * * | 0 1 0 0  0 1 1 0 0 0 0 0 | 1 0 1 0 1 0
..   .x    || ..   ..    | 0  2 0  0 | *  * * * 5  * *  * * * | 0 0 1 0  0 1 0 1 0 0 0 0 | 1 0 0 1 1 0
.o5/2.o    || .o5/2.o    | 0  1 0  1 | *  * * * * 10 *  * * * | 0 0 0 0  1 0 1 1 0 0 0 0 | 0 0 1 1 1 0
..   ..    || x.   ..    | 0  0 2  0 | *  * * * *  * 5  * * * | 0 0 0 1  0 0 0 0 1 1 0 0 | 0 1 1 0 0 1
..   ..    || oo5/2oo&#x | 0  0 1  1 | *  * * * *  * * 10 * * | 0 0 0 0  1 0 0 0 0 1 1 0 | 0 0 1 1 0 1
..   ..    || .x   ..    | 0  0 0  2 | *  * * * *  * *  * 5 * | 0 0 0 0  0 0 1 0 0 1 0 1 | 0 0 1 0 1 1
..   ..    || ..   .x    | 0  0 0  2 | *  * * * *  * *  * * 5 | 0 0 0 0  0 0 0 1 0 0 1 1 | 0 0 0 1 1 1
-------------------------+-----------+------------------------+--------------------------+------------
x.5/2o.    || ..   ..    | 5  0 0  0 | 5  0 0 0 0  0 0  0 0 0 | 1 * * *  * * * * * * * * | 1 1 0 0 0 0
xx   ..&#x || ..   ..    | 2  2 0  0 | 1  2 0 1 0  0 0  0 0 0 | * 5 * *  * * * * * * * * | 1 0 1 0 0 0
..   ox&#x || ..   ..    | 1  2 0  0 | 0  2 0 0 1  0 0  0 0 0 | * * 5 *  * * * * * * * * | 1 0 0 1 0 0
x.   ..    || x.   ..    | 2  0 2  0 | 1  0 2 0 0  0 1  0 0 0 | * * * 5  * * * * * * * * | 0 1 1 0 0 0
oo5/2oo&#x || oo5/2oo&#x | 1  1 1  1 | 0  1 1 0 0  1 0  1 0 0 | * * * * 10 * * * * * * * | 0 0 1 1 0 0
.x5/2.x    || ..   ..    | 0 10 0  0 | 0  0 0 5 5  0 0  0 0 0 | * * * *  * 1 * * * * * * | 1 0 0 0 1 0
.x   ..    || .x   ..    | 0  2 0  2 | 0  0 0 1 0  2 0  0 1 0 | * * * *  * * 5 * * * * * | 0 0 1 0 1 0
..   .x    || ..   .x    | 0  2 0  2 | 0  0 0 0 1  2 0  0 0 1 | * * * *  * * * 5 * * * * | 0 0 0 1 1 0
..   ..    || x.5/2o.    | 0  0 5  0 | 0  0 0 0 0  0 5  0 0 0 | * * * *  * * * * 1 * * * | 0 1 0 0 0 1
..   ..    || xx   ..&#x | 0  0 2  2 | 0  0 0 0 0  0 1  2 1 0 | * * * *  * * * * * 5 * * | 0 0 1 0 0 1
..   ..    || ..   ox&#x | 0  0 1  2 | 0  0 0 0 0  0 0  2 0 1 | * * * *  * * * * * * 5 * | 0 0 0 1 0 1
..   ..    || .x5/2.x    | 0  0 0 10 | 0  0 0 0 0  0 0  0 5 5 | * * * *  * * * * * * * 1 | 0 0 0 0 1 1
-----------------------+-----------+------------------------+--------------------------+------------
xx5/2ox&#x || ..   ..    ♦ 5 10 0  0 | 5 10 0 5 5  0 0  0 0 0 | 1 5 5 0  0 1 0 0 0 0 0 0 | 1 * * * * *
x.5/2o.    || x.5/2o.    ♦ 5  0 5  0 | 5  0 5 0 0  0 5  0 0 0 | 1 0 0 5  0 0 0 0 1 0 0 0 | * 1 * * * *
xx   ..&#x || xx   ..&#x ♦ 2  2 2  2 | 1  2 2 1 0  2 1  2 1 0 | 0 1 0 1  2 0 1 0 0 1 0 0 | * * 5 * * *
..   ox&#x || ..   ox&#x ♦ 1  2 1  2 | 0  2 1 0 1  2 0  2 0 1 | 0 0 1 0  2 0 0 1 0 0 1 0 | * * * 5 * *
.x5/2.x    || .x5/2.x    ♦ 0 10 0 10 | 0  0 0 5 5 10 0  0 5 5 | 0 0 0 0  0 1 5 5 0 0 0 1 | * * * * 1 *
..   ..    || xx5/2ox&#x ♦ 0  0 5 10 | 0  0 0 0 0  0 5 10 5 5 | 0 0 0 0  0 0 0 0 1 5 5 1 | * * * * * 1