The relation to ex runs as follows: ex in axial icosahedral subsymmetry can be given as VFfxo2oxofo3oooox5ooxoo&#zx = oxofofoxo3ooooxoooo5ooxoooxoo&#xt (F = ff = f+x, V = uf = f+f). That will be transformed into VFfxo2oxofx3oooo(-x)5ooxof&#zx. Then into VFfxo2o(-x)ofx3oxoo(-x)5ooxof&#zx. And finally into VFfxo2ooofx3o(-x)oo(-x)5ofxof&#zx. Then a Stott expansion wrt. the third node produces this polychoron.

It further allows for a bistratically parabidiminishing fxo ofx3xxo5xof&#zx too.

Incidence matrix according to Dynkin symbol

ooofxfooo3xoxxoxxox5ofxofoxfo&#xt   → height(1,2) = height(3,4) = height(6,7) = height(8,9) = (sqrt(5)-1)/4 = 0.309017
                                      height(2,3) = height(4,5) = height(5,6) = height(7,8) = 1/2
(id || pseudo f-doe || pseudo tid || pseudo (f,x)-ti || pseudo (x,f)-srid || pseudo (f,x)-ti || pseudo tid || pseudo f-doe || id)

o........3o........5o........     & | 60  *   *   *  * ♦   4   2   0   0  0   0   0   0   0  0  0 |  2  2   4  1   0  0   0   0   0   0   0  0   0  0   0  0 | 1  2  2  0  0  0   0  0  0
.o.......3.o.......5.o.......     & |  * 40   *   *  * ♦   0   3   3   0  0   0   0   0   0  0  0 |  0  0   3  3   3  0   0   0   0   0   0  0   0  0   0  0 | 0  1  3  1  0  0   0  0  0
..o......3..o......5..o......     & |  *  * 120   *  * |   0   0   1   2  1   2   2   0   0  0  0 |  0  0   0  1   2  1   2   2   1   2   2  0   0  0   0  0 | 0  0  2  1  1  1   2  0  0
...o.....3...o.....5...o.....     & |  *  *   * 120  * |   0   0   0   0  0   2   0   2   2  1  0 |  0  0   0  0   0  0   2   1   0   0   2  1   2  2   2  0 | 0  0  1  0  0  1   2  1  2
....o....3....o....5....o....       |  *  *   *   * 60 |   0   0   0   0  0   0   4   0   4  0  2 |  0  0   0  0   0  0   0   0   4   2   4  0   2  0   2  1 | 0  0  0  0  2  2   2  0  1
------------------------------------+------------------+------------------------------------------+----------------------------------------------------------+---------------------------
......... x........ .........     & |  2  0   0   0  0 | 120   *   *   *  *   *   *   *   *  *  * |  1  1   1  0   0  0   0   0   0   0   0  0   0  0   0  0 | 1  1  1  0  0  0   0  0  0
oo.......3oo.......5oo.......&#x  & |  1  1   0   0  0 |   * 120   *   *  *   *   *   *   *  *  * |  0  0   2  1   0  0   0   0   0   0   0  0   0  0   0  0 | 0  1  2  0  0  0   0  0  0
.oo......3.oo......5.oo......&#x  & |  0  1   1   0  0 |   *   * 120   *  *   *   *   *   *  *  * |  0  0   0  1   2  0   0   0   0   0   0  0   0  0   0  0 | 0  0  2  1  0  0   0  0  0
......... ..x...... .........     & |  0  0   2   0  0 |   *   *   * 120  *   *   *   *   *  *  * |  0  0   0  0   1  1   1   0   0   1   0  0   0  0   0  0 | 0  0  1  1  1  0   1  0  0
......... ......... ..x......     & |  0  0   2   0  0 |   *   *   *   * 60   *   *   *   *  *  * |  0  0   0  1   0  0   0   2   0   0   0  0   0  0   0  0 | 0  0  2  0  0  1   0  0  0
..oo.....3..oo.....5..oo.....&#x  & |  0  0   1   1  0 |   *   *   *   *  * 240   *   *   *  *  * |  0  0   0  0   0  0   1   1   0   0   1  0   0  0   0  0 | 0  0  1  0  0  1   1  0  0
..o.o....3..o.o....5..o.o....&#x  & |  0  0   1   0  1 |   *   *   *   *  *   * 240   *   *  *  * |  0  0   0  0   0  0   0   0   1   1   1  0   0  0   0  0 | 0  0  0  0  1  1   1  0  0
......... ...x..... .........     & |  0  0   0   2  0 |   *   *   *   *  *   *   * 120   *  *  * |  0  0   0  0   0  0   1   0   0   0   0  1   1  1   0  0 | 0  0  1  0  0  0   1  1  1
...oo....3...oo....5...oo....&#x  & |  0  0   0   1  1 |   *   *   *   *  *   *   *   * 240  *  * |  0  0   0  0   0  0   0   0   0   0   1  0   1  0   1  0 | 0  0  0  0  0  1   1  0  1
...o.o...3...o.o...5...o.o...&#x    |  0  0   0   2  0 |   *   *   *   *  *   *   *   *   * 60  * |  0  0   0  0   0  0   0   0   0   0   0  0   0  2   2  0 | 0  0  0  0  0  1   0  1  2
....x.... ......... .........       |  0  0   0   0  2 |   *   *   *   *  *   *   *   *   *  * 60 |  0  0   0  0   0  0   0   0   2   0   0  0   0  0   0  1 | 0  0  0  0  2  1   0  0  0
------------------------------------+------------------+------------------------------------------+----------------------------------------------------------+---------------------------
o........3x........ .........     & |  3  0   0   0  0 |   3   0   0   0  0   0   0   0   0  0  0 | 40  *   *  *   *  *   *   *   *   *   *  *   *  *   *  * | 1  1  0  0  0  0   0  0  0
......... x........5o........     & |  5  0   0   0  0 |   5   0   0   0  0   0   0   0   0  0  0 |  * 24   *  *   *  *   *   *   *   *   *  *   *  *   *  * | 1  0  1  0  0  0   0  0  0
......... xo....... .........&#x  & |  2  1   0   0  0 |   1   2   0   0  0   0   0   0   0  0  0 |  *  * 120  *   *  *   *   *   *   *   *  *   *  *   *  * | 0  1  1  0  0  0   0  0  0
......... ......... ofx......&#x  & |  1  2   2   0  0 |   0   2   2   0  1   0   0   0   0  0  0 |  *  *   * 60   *  *   *   *   *   *   *  *   *  *   *  * | 0  0  2  0  0  0   0  0  0
......... .ox...... .........&#x  & |  0  1   2   0  0 |   0   0   2   1  0   0   0   0   0  0  0 |  *  *   *  * 120  *   *   *   *   *   *  *   *  *   *  * | 0  0  1  1  0  0   0  0  0
..o......3..x...... .........     & |  0  0   3   0  0 |   0   0   0   3  0   0   0   0   0  0  0 |  *  *   *  *   * 40   *   *   *   *   *  *   *  *   *  * | 0  0  0  1  1  0   0  0  0
......... ..xx..... .........&#x  & |  0  0   2   2  0 |   0   0   0   1  0   2   0   1   0  0  0 |  *  *   *  *   *  * 120   *   *   *   *  *   *  *   *  * | 0  0  1  0  0  0   1  0  0
......... ......... ..xo.....&#x  & |  0  0   2   1  0 |   0   0   0   0  1   2   0   0   0  0  0 |  *  *   *  *   *  *   * 120   *   *   *  *   *  *   *  * | 0  0  1  0  0  1   0  0  0
..o.x.... ......... .........&#x  & |  0  0   1   0  2 |   0   0   0   0  0   0   2   0   0  0  1 |  *  *   *  *   *  *   *   * 120   *   *  *   *  *   *  * | 0  0  0  0  1  1   0  0  0
......... ..x.o.... .........&#x  & |  0  0   2   0  1 |   0   0   0   1  0   0   2   0   0  0  0 |  *  *   *  *   *  *   *   *   * 120   *  *   *  *   *  * | 0  0  0  0  1  0   1  0  0
..ooo....3..ooo....5..ooo....&#x  & |  0  0   1   1  1 |   0   0   0   0  0   1   1   0   1  0  0 |  *  *   *  *   *  *   *   *   *   * 240  *   *  *   *  * | 0  0  0  0  0  1   1  0  0
......... ...x.....5...o.....     & |  0  0   0   5  0 |   0   0   0   0  0   0   0   5   0  0  0 |  *  *   *  *   *  *   *   *   *   *   * 24   *  *   *  * | 0  0  1  0  0  0   0  1  0
......... ...xo.... .........&#x  & |  0  0   0   2  1 |   0   0   0   0  0   0   0   1   2  0  0 |  *  *   *  *   *  *   *   *   *   *   *  * 120  *   *  * | 0  0  0  0  0  0   1  0  1
......... ...x.x... .........&#x    |  0  0   0   4  0 |   0   0   0   0  0   0   0   2   0  2  0 |  *  *   *  *   *  *   *   *   *   *   *  *   * 60   *  * | 0  0  0  0  0  0   0  1  1
...ooo...3...ooo...5...ooo...&#x    |  0  0   0   2  1 |   0   0   0   0  0   0   0   0   2  1  0 |  *  *   *  *   *  *   *   *   *   *   *  *   *  * 120  * | 0  0  0  0  0  1   0  0  1
....x....3....o.... .........       |  0  0   0   0  3 |   0   0   0   0  0   0   0   0   0  0  3 |  *  *   *  *   *  *   *   *   *   *   *  *   *  *   * 20 | 0  0  0  0  2  0   0  0  0
------------------------------------+------------------+------------------------------------------+----------------------------------------------------------+---------------------------
o........3x........5o........     & ♦ 30  0   0   0  0 |  60   0   0   0  0   0   0   0   0  0  0 | 20 12   0  0   0  0   0   0   0   0   0  0   0  0   0  0 | 2  *  *  *  *  *   *  *  *
oo.......3xo....... .........&#x  & ♦  3  1   0   0  0 |   3   3   0   0  0   0   0   0   0  0  0 |  1  0   3  0   0  0   0   0   0   0   0  0   0  0   0  0 | * 40  *  *  *  *   *  *  *
......... xoxx.....5ofxo.....&#xt & ♦  5  5  10   5  0 |   5  10  10   5  5  10   0   5   0  0  0 |  0  1   5  5   5  0   5   5   0   0   0  1   0  0   0  0 | *  * 24  *  *  *   *  *  *
.oo......3.ox...... .........&#x  & ♦  0  1   3   0  0 |   0   0   3   3  0   0   0   0   0  0  0 |  0  0   0  0   3  1   0   0   0   0   0  0   0  0   0  0 | *  *  * 40  *  *   *  *  *
..o.x....3..x.o.... .........&#x  & ♦  0  0   3   0  3 |   0   0   0   3  0   0   6   0   0  0  3 |  0  0   0  0   0  1   0   0   3   3   0  0   0  0   0  1 | *  *  *  * 40  *   *  *  *
..ofxfo.. ......... ..xofox..&#xt   ♦  0  0   4   4  4 |   0   0   0   0  2   8   8   0   8  2  2 |  0  0   0  0   0  0   0   4   4   0   8  0   0  0   4  0 | *  *  *  *  * 30   *  *  *
......... ..xxo.... .........&#x  & ♦  0  0   2   2  1 |   0   0   0   1  0   2   2   1   2  0  0 |  0  0   0  0   0  0   1   0   0   1   2  0   1  0   0  0 | *  *  *  *  *  * 120  *  *
......... ...x.x...5...o.o...&#x    ♦  0  0   0  10  0 |   0   0   0   0  0   0   0  10   0  5  0 |  0  0   0  0   0  0   0   0   0   0   0  2   0  5   0  0 | *  *  *  *  *  *   * 12  *
......... ...xox... .........&#x    ♦  0  0   0   4  1 |   0   0   0   0  0   0   0   2   4  2  0 |  0  0   0  0   0  0   0   0   0   0   0  0   2  1   2  0 | *  *  *  *  *  *   *  * 60