Acronym trial trapen
Name triangle atop inverted triangle-pentachoron duoprism,
triangle-first cap of roc
Circumradius sqrt(3)/2 = 0.866025
Lace hyper city
in approx. ASCII-art
  x3o3o3o        
                 
                 
          x3o3o3o
                 
                 
  x3o3o3o        
trapen
        o3o3o3o  
                 
                 
o3o3o3o          
                 
                 
        o3o3o3o  
dual {3}
Face vector 18, 78, 156, 180, 128, 54, 12
Confer
uniform relative:
roc  
general polytopal classes:
segmentoexa   lace simplices  

Incidence matrix according to Dynkin symbol

xo3ox ox3oo3oo3oo&#x   → height = 2/sqrt(15) = 0.516398
({3} || {3}-dual trapen)

o.3o. o.3o.3o.3o.    | 3  *  2 10  0  0 | 1 10  5 20 0  0  0 | 5 20 10 20  0  0  0 | 10 20 10 10  0  0 0 | 10 10  5 2 0 0 | 5 2 1 0
.o3.o .o3.o3.o3.o    | * 15 | 0  2  2  4 | 0  1  2  8 1  8  6 | 1  4  8 12  4 12  4 |  4  6 12  8  6  8 1 |  6  4  8 2 4 2 | 4 1 2 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
x. .. .. .. .. ..    | 2  0 | 3  *  *  * | 1  5  0  0 0  0  0 | 5 10  0  0  0  0  0 | 10 10  0  0  0  0 0 | 10  5  0 0 0 0 | 5 1 0 0
oo3oo oo3oo3oo3oo&#x | 1  1 | * 30  *  * | 0  1  1  4 0  0  0 | 1  4  4  6  0  0  0 |  4  6  6  4  0  0 0 |  6  4  4 1 0 0 | 4 1 1 0
.. .x .. .. .. ..    | 0  2 | *  * 15  * | 0  0  1  0 1  4  0 | 1  0  4  0  4  6  0 |  4  0  6  0  6  4 0 |  6  0  4 0 4 1 | 4 0 1 1
.. .. .x .. .. ..    | 0  2 | *  *  * 30 | 0  0  0  2 0  2  3 | 0  1  2  6  1  6  3 |  1  3  6  6  3  6 1 |  3  3  6 2 3 2 | 3 1 2 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
x.3o. .. .. .. ..    | 3  0 | 3  0  0  0 | 1  *  *  * *  *  *  5  0  0  0  0  0  0 | 10  0  0  0  0  0 0 | 10  0  0 0 0 0 | 5 0 0 0
xo .. .. .. .. ..&#x | 2  1 | 1  2  0  0 | * 15  *  * *  *  * | 1  4  0  0  0  0  0 |  4  6  0  0  0  0 0 |  6  4  0 0 0 0 | 4 1 0 0
.. ox .. .. .. ..&#x | 1  2 | 0  2  1  0 | *  * 15  * *  *  *  1  0  4  0  0  0  0 |  4  0  6  0  0  0 0 |  6  0  4 0 0 0 | 4 0 1 0
.. .. ox .. .. ..&#x | 1  2 | 0  2  0  1 | *  *  * 60 *  *  * | 0  1  1  3  0  0  0 |  1  3  3  3  0  0 0 |  3  3  3 1 0 0 | 3 1 1 0
.o3.x .. .. .. ..    | 0  3 | 0  0  3  0 | *  *  *  * 5  *  * | 1  0  0  0  4  0  0 |  4  0  0  0  6  0 0 |  6  0  0 0 4 0 | 4 0 0 1
.. .x .x .. .. ..    | 0  4 | 0  0  2  2 | *  *  *  * * 30  * | 0  0  1  0  1  3  0 |  1  0  3  0  3  3 0 |  3  0  3 0 3 1 | 3 0 1 1
.. .. .x3.o .. ..    | 0  3 | 0  0  0  3 | *  *  *  * *  * 30 | 0  0  0  2  0  2  2 |  0  1  2  4  1  4 1 |  1  2  4 2 2 2 | 2 1 2 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
xo3ox .. .. .. ..&#x  3  3 | 3  6  3  0 | 1  3  3  0 1  0  0 | 5  *  *  *  *  *  *   4  0  0  0  0  0 0 |  6  0  0 0 0 0 | 4 0 0 0
xo .. ox .. .. ..&#x  2  2 | 1  4  0  1 | 0  2  0  2 0  0  0 | * 30  *  *  *  *  * |  1  3  0  0  0  0 0 |  3  3  0 0 0 0 | 3 1 0 0
.. ox ox .. .. ..&#x  1  4 | 0  4  2  2 | 0  0  2  2 0  1  0 | *  * 30  *  *  *  *   1  0  3  0  0  0 0 |  3  0  3 0 0 0 | 3 0 1 0
.. .. ox3oo .. ..&#x  1  3 | 0  3  0  3 | 0  0  0  3 0  0  1 | *  *  * 60  *  *  * |  0  1  1  2  0  0 0 |  1  2  2 1 0 0 | 2 1 1 0
.o3.x .x .. .. ..     0  6 | 0  0  6  3 | 0  0  0  0 2  3  0 | *  *  *  * 10  *  * |  1  0  0  0  3  0 0 |  3  0  0 0 3 0 | 3 0 0 1
.. .x .x3.o .. ..     0  6 | 0  0  3  6 | 0  0  0  0 0  3  2 | *  *  *  *  * 30  * |  0  0  1  0  1  2 0 |  1  0  2 0 2 1 | 2 0 1 1
.. .. .x3.o3.o ..     0  4 | 0  0  0  6 | 0  0  0  0 0  0  4 | *  *  *  *  *  * 15 |  0  0  0  2  0  2 1 |  0  1  2 2 1 2 | 1 1 2 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
xo3ox ox .. .. ..&#x  3  6 | 3 12  6  3 | 1  6  6  6 2  3  0 | 2  3  3  0  1  0  0 | 10  *  *  *  *  * * |  3  0  0 0 0 0 | 3 0 0 0
xo .. ox3oo .. ..&#x  2  3 | 1  6  0  3 | 0  3  0  6 0  0  1 | 0  3  0  2  0  0  0 |  * 30  *  *  *  * * |  1  2  0 0 0 0 | 2 1 0 0
.. ox ox3oo .. ..&#x  1  6 | 0  6  3  6 | 0  0  3  6 0  3  2 | 0  0  3  2  0  1  0 |  *  * 30  *  *  * * |  1  0  2 0 0 0 | 2 0 1 0
.. .. ox3oo3oo ..&#x  1  4 | 0  4  0  6 | 0  0  0  6 0  0  4 | 0  0  0  4  0  0  1 |  *  *  * 30  *  * * |  0  1  1 1 0 0 | 1 1 1 0
.o3.x .x3.o .. ..     0  9 | 0  0  9  9 | 0  0  0  0 3  9  3 | 0  0  0  0  3  3  0 |  *  *  *  * 10  * * |  1  0  0 0 2 0 | 2 0 0 1
.. .x .x3.o3.o ..     0  8 | 0  0  4 12 | 0  0  0  0 0  6  8 | 0  0  0  0  0  4  2 |  *  *  *  *  * 15 * |  0  0  1 0 1 1 | 1 0 1 1
.. .. .x3.o3.o3.o     0  5 | 0  0  0 10 | 0  0  0  0 0  0 10 | 0  0  0  0  0  0  5 |  *  *  *  *  *  * 3 |  0  0  0 2 0 2 | 0 1 2 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
xo3ox ox3oo .. ..&#x  3  9 | 3 18  9  9 | 1  9  9 18 3  9  3 | 3  9  9  6  3  3  0 |  3  3  3  0  1  0 0 | 10  *  * * * * | 2 0 0 0
xo .. ox3oo3oo ..&#x  2  4 | 1  8  0  6 | 0  4  0 12 0  0  4 | 0  6  0  8  0  0  1 |  0  4  0  2  0  0 0 |  * 15  * * * * | 1 1 0 0
.. ox ox3oo3oo ..&#x  1  8 | 0  8  4 12 | 0  0  4 12 0  6  8 | 0  0  6  8  0  4  2 |  0  0  4  2  0  1 0 |  *  * 15 * * * | 1 0 1 0
.. .. ox3oo3oo3oo&#x  1  5 | 0  5  0 10 | 0  0  0 10 0  0 10 | 0  0  0 10  0  0  5 |  0  0  0  5  0  0 1 |  *  *  * 6 * * | 0 1 1 0
.o3.x .x3.o3.o ..     0 12 | 0  0 12 18 | 0  0  0  0 4 18 12 | 0  0  0  0  6 12  3 |  0  0  0  0  4  3 0 |  *  *  * * 5 * | 1 0 0 1
.. .x .x3.o3.o3.o     0 10 | 0  0  5 20 | 0  0  0  0 0 10 20 | 0  0  0  0  0 10 10 |  0  0  0  0  0  5 2 |  *  *  * * * 3 | 0 0 1 1
---------------------+------+------------+--------------------+---------------------+---------------------+----------------+--------
xo3ox ox3oo3oo ..&#x  3 12 | 3 24 12 18 | 1 12 12 36 4 18 12 | 4 18 18 24  6 12  3 |  6 12 12  6  4  3 0 |  4  3  3 0 1 0 | 5 * * *
xo .. ox3oo3oo3oo&#x  2  5 | 1 10  0 10 | 0  5  0 20 0  0 10 | 0 10  0 20  0  0  5 |  0 10  0 10  0  0 1 |  0  5  0 2 0 0 | * 3 * *
.. ox ox3oo3oo3oo&#x  1 10 | 0 10  5 20 | 0  0  5 20 0 10 20 | 0  0 10 20  0 10 10 |  0  0 10 10  0  5 2 |  0  0  5 2 0 1 | * * 3 *
.o3.x .x3.o3.o3.o     0 15 | 0  0 15 30 | 0  0  0  0 5 30 30 | 0  0  0  0 10 30 15 |  0  0  0  0 10 15 3 |  0  0  0 0 5 3 | * * * 1

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