Looks like a compound of 2 rectified hecatonicosachora (rahi) with 2400 additional tetrahedra (tet). In this "look" tetrahedra coincide by 6 each.

Incidence matrix according to Dynkin symbol

o3o3β5β

both( . . . . ) | 2400 |    6    6 |    3    3    3    9 |   1   3    4
----------------+------+-----------+---------------------+-------------
sefa( . o3β . ) |    2 | 7200    * |    1    0    1    1 |   1   1    1
sefa( . . s5s ) |    2 |    * 7200 |    0    1    0    2 |   0   2    1
----------------+------+-----------+---------------------+-------------
      . o3β .   ♦    3 |    3    0 | 2400    *    *    * |   1   1    0
both( . . s5s ) ♦    5 |    0    5 |    * 1440    *    * |   0   2    0
sefa( o3o3β . ) |    3 |    3    0 |    *    * 2400    * |   1   0    1
sefa( . o3β5β ) |    3 |    1    2 |    *    *    * 7200 |   0   1    1
----------------+------+-----------+---------------------+-------------
      o3o3β .   ♦    4 |   12    0 |    4    0    4    0 | 600   *    *
      . o3β5β   ♦   60 |   60  120 |   20   24    0   60 |   * 120    *
sefa( o3o3β5β ) ♦    4 |    3    3 |    0    0    1    3 |   *   * 2400

starting figure: o3o3x5x