The structure described by Ce2Ni2GaAl crystallizes in the monoclinic Pm space group. There are six inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(2) atoms. In the second Ce site, Ce(2) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(1), two equivalent Ni(4), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(3) atoms. In the third Ce site, Ce(3) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(1), two equivalent Ni(3), two equivalent Ga(2), two equivalent Ga(3), and two equivalent Al(2) atoms. In the fourth Ce site, Ce(4) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(1), two equivalent Al(1), and two equivalent Al(3) atoms. In the fifth Ce site, Ce(5) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(1), two equivalent Ni(3), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(2) atoms. In the sixth Ce site, Ce(6) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(3) atoms. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Ce(5), one Ga(1), one Ga(3), and one Al(2) atom. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), two equivalent Ce(6), one Ga(2), one Al(1), and one Al(3) atom. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(5), one Ga(2), one Ga(3), and one Al(2) atom. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(6), one Ga(1), one Al(1), and one Al(3) atom. In the fifth Ni site, Ni(5) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(3), one Ce(6), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(2) atoms. In the sixth Ni site, Ni(6) is bonded in a 9-coordinate geometry to one Ce(2), one Ce(4), one Ce(5), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(3) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(5), one Ni(1), one Ni(4), two equivalent Ni(6), one Ga(3), and one Al(3) atom to form distorted GaCe6AlGaNi4 cuboctahedra that share corners with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, corners with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra, edges with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, faces with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra. In the second Ga site, Ga(2) is bonded to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(6), one Ni(2), one Ni(3), two equivalent Ni(5), one Al(1), and one Al(2) atom to form GaCe6Al2Ni4 cuboctahedra that share corners with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, corners with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra,  a faceface with one Ga(3)Ce6AlGaNi4 cuboctahedra,  a faceface with one Al(3)Ce6Ga2Ni4 cuboctahedra, and faces with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra. In the third Ga site, Ga(3) is bonded to two equivalent Ce(2), two equivalent Ce(3), two equivalent Ce(5), one Ni(1), one Ni(3), two equivalent Ni(6), one Ga(1), and one Al(3) atom to form distorted GaCe6AlGaNi4 cuboctahedra that share corners with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra, corners with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra,  a faceface with one Ga(2)Ce6Al2Ni4 cuboctahedra,  a faceface with one Al(3)Ce6Ga2Ni4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), two equivalent Ce(6), one Ni(2), one Ni(4), two equivalent Ni(5), one Ga(2), and one Al(2) atom. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(5), one Ni(1), one Ni(3), two equivalent Ni(5), one Ga(2), and one Al(1) atom. In the third Al site, Al(3) is bonded to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(6), one Ni(2), one Ni(4), two equivalent Ni(6), one Ga(1), and one Ga(3) atom to form distorted AlCe6Ga2Ni4 cuboctahedra that share corners with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra, corners with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra,  a faceface with one Ga(2)Ce6Al2Ni4 cuboctahedra,  a faceface with one Ga(3)Ce6AlGaNi4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_Ce2AlGaNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.023
_cell_length_b   6.940
_cell_length_c   11.963
_cell_angle_alpha   89.752
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   333.970
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.500  0.427  1.000  1.0
  Ce  Ce1  1  0.500  0.925  0.500  1.0
  Ce  Ce2  1  0.500  0.787  0.787  1.0
  Ce  Ce3  1  0.500  0.288  0.289  1.0
  Ce  Ce4  1  0.500  0.290  0.710  1.0
  Ce  Ce5  1  0.500  0.788  0.212  1.0
  Al  Al6  1  0.000  0.115  0.115  1.0
  Al  Al7  1  0.000  0.115  0.884  1.0
  Al  Al8  1  0.000  0.615  0.385  1.0
  Ga  Ga9  1  0.000  0.266  0.500  1.0
  Ga  Ga10  1  0.000  0.767  1.000  1.0
  Ga  Ga11  1  0.000  0.618  0.617  1.0
  Ni  Ni12  1  0.000  0.001  0.668  1.0
  Ni  Ni13  1  0.000  0.498  0.168  1.0
  Ni  Ni14  1  0.000  0.498  0.834  1.0
  Ni  Ni15  1  0.000  0.998  0.332  1.0
  Ni  Ni16  1  0.500  0.004  1.000  1.0
  Ni  Ni17  1  0.500  0.502  0.498  1.0
[/CIF]
.
The structure described by Ce2Ni2GaAl crystallizes in the monoclinic Pm space group. There are six inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(2) atoms. In the second Ce site, Ce(2) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(1), two equivalent Ni(4), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(3) atoms. In the third Ce site, Ce(3) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(1), two equivalent Ni(3), two equivalent Ga(2), two equivalent Ga(3), and two equivalent Al(2) atoms. In the fourth Ce site, Ce(4) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(1), two equivalent Al(1), and two equivalent Al(3) atoms. In the fifth Ce site, Ce(5) is bonded in a 11-coordinate geometry to one Ni(6), two equivalent Ni(1), two equivalent Ni(3), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(2) atoms. In the sixth Ce site, Ce(6) is bonded in a 11-coordinate geometry to one Ni(5), two equivalent Ni(2), two equivalent Ni(4), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(3) atoms. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(3), two equivalent Ce(5), one Ga(1), one Ga(3), and one Al(2) atom. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), two equivalent Ce(6), one Ga(2), one Al(1), and one Al(3) atom. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(5), one Ga(2), one Ga(3), and one Al(2) atom. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(6), one Ga(1), one Al(1), and one Al(3) atom. In the fifth Ni site, Ni(5) is bonded in a 9-coordinate geometry to one Ce(1), one Ce(3), one Ce(6), two equivalent Ga(2), two equivalent Al(1), and two equivalent Al(2) atoms. In the sixth Ni site, Ni(6) is bonded in a 9-coordinate geometry to one Ce(2), one Ce(4), one Ce(5), two equivalent Ga(1), two equivalent Ga(3), and two equivalent Al(3) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(5), one Ni(1), one Ni(4), two equivalent Ni(6), one Ga(3), and one Al(3) atom to form distorted GaCe6AlGaNi4 cuboctahedra that share corners with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, corners with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra, edges with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, faces with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra. In the second Ga site, Ga(2) is bonded to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(6), one Ni(2), one Ni(3), two equivalent Ni(5), one Al(1), and one Al(2) atom to form GaCe6Al2Ni4 cuboctahedra that share corners with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra, corners with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra,  a faceface with one Ga(3)Ce6AlGaNi4 cuboctahedra,  a faceface with one Al(3)Ce6Ga2Ni4 cuboctahedra, and faces with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra. In the third Ga site, Ga(3) is bonded to two equivalent Ce(2), two equivalent Ce(3), two equivalent Ce(5), one Ni(1), one Ni(3), two equivalent Ni(6), one Ga(1), and one Al(3) atom to form distorted GaCe6AlGaNi4 cuboctahedra that share corners with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra, corners with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra,  a faceface with one Ga(2)Ce6Al2Ni4 cuboctahedra,  a faceface with one Al(3)Ce6Ga2Ni4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Ce(4), two equivalent Ce(6), one Ni(2), one Ni(4), two equivalent Ni(5), one Ga(2), and one Al(2) atom. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Ce(1), two equivalent Ce(3), two equivalent Ce(5), one Ni(1), one Ni(3), two equivalent Ni(5), one Ga(2), and one Al(1) atom. In the third Al site, Al(3) is bonded to two equivalent Ce(2), two equivalent Ce(4), two equivalent Ce(6), one Ni(2), one Ni(4), two equivalent Ni(6), one Ga(1), and one Ga(3) atom to form distorted AlCe6Ga2Ni4 cuboctahedra that share corners with two equivalent Ga(2)Ce6Al2Ni4 cuboctahedra, corners with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, edges with two equivalent Ga(3)Ce6AlGaNi4 cuboctahedra,  a faceface with one Ga(2)Ce6Al2Ni4 cuboctahedra,  a faceface with one Ga(3)Ce6AlGaNi4 cuboctahedra, faces with two equivalent Ga(1)Ce6AlGaNi4 cuboctahedra, and faces with two equivalent Al(3)Ce6Ga2Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_Ce2AlGaNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.023
_cell_length_b   6.940
_cell_length_c   11.963
_cell_angle_alpha   89.752
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   333.970
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.500  0.427  1.000  1.0
  Ce  Ce1  1  0.500  0.925  0.500  1.0
  Ce  Ce2  1  0.500  0.787  0.787  1.0
  Ce  Ce3  1  0.500  0.288  0.289  1.0
  Ce  Ce4  1  0.500  0.290  0.710  1.0
  Ce  Ce5  1  0.500  0.788  0.212  1.0
  Al  Al6  1  0.000  0.115  0.115  1.0
  Al  Al7  1  0.000  0.115  0.884  1.0
  Al  Al8  1  0.000  0.615  0.385  1.0
  Ga  Ga9  1  0.000  0.266  0.500  1.0
  Ga  Ga10  1  0.000  0.767  1.000  1.0
  Ga  Ga11  1  0.000  0.618  0.617  1.0
  Ni  Ni12  1  0.000  0.001  0.668  1.0
  Ni  Ni13  1  0.000  0.498  0.168  1.0
  Ni  Ni14  1  0.000  0.498  0.834  1.0
  Ni  Ni15  1  0.000  0.998  0.332  1.0
  Ni  Ni16  1  0.500  0.004  1.000  1.0
  Ni  Ni17  1  0.500  0.502  0.498  1.0
[/CIF]
.