As abstract polytope sefdit dixdy is isomorphic to gefdit dixdy, thereby replacing pentagrams by pentagons, resp. gid by id and siid by giid.

This polychoron is exotic, as 2 classes of triangles coincide pairwise. Also the edges coincide pairwise. It also is fissary, as its vertices coincide by 3. In fact, each vertex figure is kind a x2x || x2v, linked diametrically by edges of length u.

This polychoron can be obtained as blend of middit thix with todtixhi, blending out their ri. Alternatively it can be obtained as blend of siddit thix with gotdatixhi, blending out their giddy.

Incidence matrix according to Dynkin symbol

x3o3/2x3o5/2*a3*c

. .   . .         | 3600 |    4    4 |    2    4    2    2    2 |   2   1   2   1
------------------+------+-----------+--------------------------+----------------
x .   . .         |    2 | 7200    * |    1    1    1    0    0 |   1   1   1   0
. .   x .         |    2 |    * 7200 |    0    1    0    1    1 |   1   0   1   1
------------------+------+-----------+--------------------------+----------------
x3o   . .         |    3 |    3    0 | 2400    *    *    *    * |   1   1   0   0
x .   x .   *a3*c |    6 |    3    3 |    * 2400    *    *    * |   1   0   1   0
x .   . o5/2*a    |    5 |    5    0 |    *    * 1440    *    * |   0   1   1   0
. o3/2x .         |    3 |    0    3 |    *    *    * 2400    * |   1   0   0   1
. .   x3o         |    3 |    0    3 |    *    *    *    * 2400 |   0   0   1   1
------------------+------+-----------+--------------------------+----------------
x3o3/2x .   *a3*c ♦   12 |   12   12 |    4    4    0    4    0 | 600   *   *   *
x3o   . o5/2*a    ♦   30 |   60    0 |   20    0   12    0    0 |   * 120   *   *
x .   x3o5/2*a3*c ♦   60 |   60   60 |    0   20   12    0   20 |   *   * 120   *
. o3/2x3o         ♦    6 |    0   12 |    0    0    0    4    4 |   *   *   * 600

x3o3/2x3/2o5/3*a3*c

. .   .   .         | 3600 |    4    4 |    2    4    2    2    2 |   2   1   2   1
--------------------+------+-----------+--------------------------+----------------
x .   .   .         |    2 | 7200    * |    1    1    1    0    0 |   1   1   1   0
. .   x   .         |    2 |    * 7200 |    0    1    0    1    1 |   1   0   1   1
--------------------+------+-----------+--------------------------+----------------
x3o   .   .         |    3 |    3    0 | 2400    *    *    *    * |   1   1   0   0
x .   x   .   *a3*c |    6 |    3    3 |    * 2400    *    *    * |   1   0   1   0
x .   .   o5/3*a    |    5 |    5    0 |    *    * 1440    *    * |   0   1   1   0
. o3/2x   .         |    3 |    0    3 |    *    *    * 2400    * |   1   0   0   1
. .   x3/2o         |    3 |    0    3 |    *    *    *    * 2400 |   0   0   1   1
--------------------+------+-----------+--------------------------+----------------
x3o3/2x   .   *a3*c ♦   12 |   12   12 |    4    4    0    4    0 | 600   *   *   *
x3o   .   o5/3*a    ♦   30 |   60    0 |   20    0   12    0    0 |   * 120   *   *
x .   x3/2o5/3*a3*c ♦   60 |   60   60 |    0   20   12    0   20 |   *   * 120   *
. o3/2x3/2o         ♦    6 |    0   12 |    0    0    0    4    4 |   *   *   * 600

x3/2o3x3o5/2*a3*c

.   . . .         | 3600 |    4    4 |    2    4    2    2    2 |   2   1   2   1
------------------+------+-----------+--------------------------+----------------
x   . . .         |    2 | 7200    * |    1    1    1    0    0 |   1   1   1   0
.   . x .         |    2 |    * 7200 |    0    1    0    1    1 |   1   0   1   1
------------------+------+-----------+--------------------------+----------------
x3/2o . .         |    3 |    3    0 | 2400    *    *    *    * |   1   1   0   0
x   . x .   *a3*c |    6 |    3    3 |    * 2400    *    *    * |   1   0   1   0
x   . . o5/2*a    |    5 |    5    0 |    *    * 1440    *    * |   0   1   1   0
.   o3x .         |    3 |    0    3 |    *    *    * 2400    * |   1   0   0   1
.   . x3o         |    3 |    0    3 |    *    *    *    * 2400 |   0   0   1   1
------------------+------+-----------+--------------------------+----------------
x3/2o3x .   *a3*c ♦   12 |   12   12 |    4    4    0    4    0 | 600   *   *   *
x3/2o . o5/2*a    ♦   30 |   60    0 |   20    0   12    0    0 |   * 120   *   *
x   . x3o5/2*a3*c ♦   60 |   60   60 |    0   20   12    0   20 |   *   * 120   *
.   o3x3o         ♦    6 |    0   12 |    0    0    0    4    4 |   *   *   * 600

x3/2o3x3/2o5/3*a3*c

.   . .   .         | 3600 |    4    4 |    2    4    2    2    2 |   2   1   2   1
--------------------+------+-----------+--------------------------+----------------
x   . .   .         |    2 | 7200    * |    1    1    1    0    0 |   1   1   1   0
.   . x   .         |    2 |    * 7200 |    0    1    0    1    1 |   1   0   1   1
--------------------+------+-----------+--------------------------+----------------
x3/2o .   .         |    3 |    3    0 | 2400    *    *    *    * |   1   1   0   0
x   . x   .   *a3*c |    6 |    3    3 |    * 2400    *    *    * |   1   0   1   0
x   . .   o5/3*a    |    5 |    5    0 |    *    * 1440    *    * |   0   1   1   0
.   o3x   .         |    3 |    0    3 |    *    *    * 2400    * |   1   0   0   1
.   . x3/2o         |    3 |    0    3 |    *    *    *    * 2400 |   0   0   1   1
--------------------+------+-----------+--------------------------+----------------
x3/2o3x   .   *a3*c ♦   12 |   12   12 |    4    4    0    4    0 | 600   *   *   *
x3/2o .   o5/3*a    ♦   30 |   60    0 |   20    0   12    0    0 |   * 120   *   *
x   . x3/2o5/3*a3*c ♦   60 |   60   60 |    0   20   12    0   20 |   *   * 120   *
.   o3x3/2o         ♦    6 |    0   12 |    0    0    0    4    4 |   *   *   * 600