The structure described by U4Ni11Ga20 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 15-coordinate geometry to two equivalent Ni(11), two equivalent Ni(2), one Ga(10), one Ga(15), one Ga(17), one Ga(2), one Ga(4), two equivalent Ga(14), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent Ni(3), two equivalent Ni(6), one Ga(1), one Ga(16), one Ga(18), one Ga(9), two equivalent Ga(13), two equivalent Ga(19), and two equivalent Ga(6) atoms. In the third U site, U(3) is bonded in a 14-coordinate geometry to two equivalent Ni(1), two equivalent Ni(8), one Ga(10), one Ga(13), one Ga(3), one Ga(7), two equivalent Ga(16), two equivalent Ga(20), and two equivalent Ga(4) atoms. In the fourth U site, U(4) is bonded in a 15-coordinate geometry to two equivalent Ni(10), two equivalent Ni(9), one Ga(1), one Ga(12), one Ga(5), one Ga(6), one Ga(8), two equivalent Ga(11), two equivalent Ga(18), and two equivalent Ga(2) atoms. There are eleven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent U(3), one Ga(12), one Ga(15), one Ga(16), one Ga(4), two equivalent Ga(3), and two equivalent Ga(7) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent U(1), one Ga(14), one Ga(7), one Ga(9), two equivalent Ga(10), and two equivalent Ga(15) atoms. In the third Ni site, Ni(3) is bonded in a 10-coordinate geometry to two equivalent U(2), one Ga(12), one Ga(13), one Ga(15), one Ga(6), two equivalent Ga(18), and two equivalent Ga(9) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Ni(5), one Ga(10), one Ga(17), one Ga(5), two equivalent Ga(14), and two equivalent Ga(20) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(4), two equivalent Ni(7), one Ga(11), one Ga(14), one Ga(19), one Ga(20), two equivalent Ga(17), and two equivalent Ga(5) atoms to form distorted face-sharing NiGa8Ni4 cuboctahedra. In the sixth Ni site, Ni(6) is bonded in a 9-coordinate geometry to two equivalent U(2), one Ga(13), one Ga(19), one Ga(3), two equivalent Ga(1), and two equivalent Ga(16) atoms. In the seventh Ni site, Ni(7) is bonded in a 9-coordinate geometry to two equivalent Ni(5), one Ga(1), one Ga(17), one Ga(5), two equivalent Ga(11), and two equivalent Ga(19) atoms. In the eighth Ni site, Ni(8) is bonded in a 9-coordinate geometry to two equivalent U(3), one Ga(16), one Ga(20), one Ga(9), two equivalent Ga(10), and two equivalent Ga(13) atoms. In the ninth Ni site, Ni(9) is bonded in a 7-coordinate geometry to two equivalent U(4), one Ga(17), one Ga(18), one Ga(2), two equivalent Ga(6), and two equivalent Ga(8) atoms. In the tenth Ni site, Ni(10) is bonded in a 9-coordinate geometry to two equivalent U(4), one Ga(11), one Ga(18), one Ga(3), two equivalent Ga(1), and two equivalent Ga(12) atoms. In the eleventh Ni site, Ni(11) is bonded in a 7-coordinate geometry to two equivalent U(1), one Ga(5), one Ga(7), one Ga(8), two equivalent Ga(2), and two equivalent Ga(4) atoms. There are twenty inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 5-coordinate geometry to one U(2), one U(4), one Ni(7), two equivalent Ni(10), two equivalent Ni(6), one Ga(12), and one Ga(16) atom. In the second Ga site, Ga(2) is bonded in a 5-coordinate geometry to one U(1), two equivalent U(4), one Ni(9), two equivalent Ni(11), one Ga(4), and two equivalent Ga(8) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one U(3), one Ni(10), one Ni(6), two equivalent Ni(1), one Ga(7), two equivalent Ga(12), and two equivalent Ga(16) atoms. In the fourth Ga site, Ga(4) is bonded in a 8-coordinate geometry to one U(1), two equivalent U(3), one Ni(1), two equivalent Ni(11), one Ga(2), one Ga(20), and two equivalent Ga(7) atoms. In the fifth Ga site, Ga(5) is bonded in a 3-coordinate geometry to one U(4), one Ni(11), one Ni(4), one Ni(7), and two equivalent Ni(5) atoms. In the sixth Ga site, Ga(6) is bonded in a 8-coordinate geometry to one U(4), two equivalent U(2), one Ni(3), two equivalent Ni(9), one Ga(19), one Ga(8), and two equivalent Ga(18) atoms. In the seventh Ga site, Ga(7) is bonded in a 12-coordinate geometry to one U(3), two equivalent U(1), one Ni(11), one Ni(2), two equivalent Ni(1), one Ga(3), two equivalent Ga(15), and two equivalent Ga(4) atoms. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one U(4), two equivalent U(1), one Ni(11), two equivalent Ni(9), one Ga(14), one Ga(6), and two equivalent Ga(2) atoms. In the ninth Ga site, Ga(9) is bonded in a 10-coordinate geometry to one U(2), one Ni(2), one Ni(8), two equivalent Ni(3), one Ga(18), two equivalent Ga(13), and two equivalent Ga(15) atoms. In the tenth Ga site, Ga(10) is bonded in a 5-coordinate geometry to one U(1), one U(3), one Ni(4), two equivalent Ni(2), two equivalent Ni(8), one Ga(13), and one Ga(15) atom. In the eleventh Ga site, Ga(11) is bonded in a 6-coordinate geometry to two equivalent U(4), one Ni(10), one Ni(5), and two equivalent Ni(7) atoms. In the twelfth Ga site, Ga(12) is bonded in a 11-coordinate geometry to one U(4), one Ni(1), one Ni(3), two equivalent Ni(10), one Ga(1), one Ga(15), two equivalent Ga(18), and two equivalent Ga(3) atoms. In the thirteenth Ga site, Ga(13) is bonded in a 12-coordinate geometry to one U(3), two equivalent U(2), one Ni(3), one Ni(6), two equivalent Ni(8), one Ga(10), two equivalent Ga(16), and two equivalent Ga(9) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 6-coordinate geometry to two equivalent U(1), one Ni(2), one Ni(5), two equivalent Ni(4), and one Ga(8) atom. In the fifteenth Ga site, Ga(15) is bonded in a 11-coordinate geometry to one U(1), one Ni(1), one Ni(3), two equivalent Ni(2), one Ga(10), one Ga(12), two equivalent Ga(7), and two equivalent Ga(9) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 12-coordinate geometry to one U(2), two equivalent U(3), one Ni(1), one Ni(8), two equivalent Ni(6), one Ga(1), two equivalent Ga(13), and two equivalent Ga(3) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 3-coordinate geometry to one U(1), one Ni(4), one Ni(7), one Ni(9), and two equivalent Ni(5) atoms. In the eighteenth Ga site, Ga(18) is bonded in a 12-coordinate geometry to one U(2), two equivalent U(4), one Ni(10), one Ni(9), two equivalent Ni(3), one Ga(9), two equivalent Ga(12), and two equivalent Ga(6) atoms. In the nineteenth Ga site, Ga(19) is bonded in a 6-coordinate geometry to two equivalent U(2), one Ni(5), one Ni(6), two equivalent Ni(7), and one Ga(6) atom. In the twentieth Ga site, Ga(20) is bonded in a 6-coordinate geometry to two equivalent U(3), one Ni(5), one Ni(8), two equivalent Ni(4), and one Ga(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_U4Ga20Ni11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.122
_cell_length_b   10.571
_cell_length_c   12.881
_cell_angle_alpha   80.936
_cell_angle_beta   80.834
_cell_angle_gamma   78.801
_symmetry_Int_Tables_number   1
_cell_volume   538.953
_cell_formula_units_Z   1
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
  U  U0  1  0.120  0.093  0.669  1.0
  U  U1  1  0.229  0.367  0.177  1.0
  U  U2  1  0.778  0.632  0.822  1.0
  U  U3  1  0.888  0.904  0.331  1.0
  Ga  Ga4  1  0.070  0.666  0.203  1.0
  Ga  Ga5  1  0.301  0.903  0.500  1.0
  Ga  Ga6  1  0.603  0.796  0.004  1.0
  Ga  Ga7  1  0.258  0.793  0.702  1.0
  Ga  Ga8  1  0.890  0.671  0.549  1.0
  Ga  Ga9  1  0.747  0.206  0.298  1.0
  Ga  Ga10  1  0.632  0.940  0.807  1.0
  Ga  Ga11  1  0.701  0.098  0.499  1.0
  Ga  Ga12  1  0.403  0.206  0.995  1.0
  Ga  Ga13  1  0.934  0.335  0.794  1.0
  Ga  Ga14  1  0.464  0.703  0.378  1.0
  Ga  Ga15  1  0.998  0.922  0.088  1.0
  Ga  Ga16  1  0.804  0.392  0.003  1.0
  Ga  Ga17  1  0.543  0.296  0.622  1.0
  Ga  Ga18  1  0.006  0.080  0.910  1.0
  Ga  Ga19  1  0.200  0.607  0.998  1.0
  Ga  Ga20  1  0.106  0.329  0.451  1.0
  Ga  Ga21  1  0.379  0.060  0.195  1.0
  Ga  Ga22  1  0.613  0.471  0.308  1.0
  Ga  Ga23  1  0.396  0.528  0.690  1.0
  Ni  Ni24  1  0.140  0.839  0.893  1.0
  Ni  Ni25  1  0.501  0.180  0.808  1.0
  Ni  Ni26  1  0.872  0.160  0.106  1.0
  Ni  Ni27  1  0.979  0.436  0.611  1.0
  Ni  Ni28  1  0.503  0.499  0.499  1.0
  Ni  Ni29  1  0.659  0.576  0.113  1.0
  Ni  Ni30  1  0.027  0.564  0.387  1.0
  Ni  Ni31  1  0.343  0.426  0.886  1.0
  Ni  Ni32  1  0.245  0.120  0.386  1.0
  Ni  Ni33  1  0.501  0.821  0.190  1.0
  Ni  Ni34  1  0.756  0.882  0.613  1.0
[/CIF]
.
The structure described by U4Ni11Ga20 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 15-coordinate geometry to two equivalent Ni(11), two equivalent Ni(2), one Ga(10), one Ga(15), one Ga(17), one Ga(2), one Ga(4), two equivalent Ga(14), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent Ni(3), two equivalent Ni(6), one Ga(1), one Ga(16), one Ga(18), one Ga(9), two equivalent Ga(13), two equivalent Ga(19), and two equivalent Ga(6) atoms. In the third U site, U(3) is bonded in a 14-coordinate geometry to two equivalent Ni(1), two equivalent Ni(8), one Ga(10), one Ga(13), one Ga(3), one Ga(7), two equivalent Ga(16), two equivalent Ga(20), and two equivalent Ga(4) atoms. In the fourth U site, U(4) is bonded in a 15-coordinate geometry to two equivalent Ni(10), two equivalent Ni(9), one Ga(1), one Ga(12), one Ga(5), one Ga(6), one Ga(8), two equivalent Ga(11), two equivalent Ga(18), and two equivalent Ga(2) atoms. There are eleven inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent U(3), one Ga(12), one Ga(15), one Ga(16), one Ga(4), two equivalent Ga(3), and two equivalent Ga(7) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent U(1), one Ga(14), one Ga(7), one Ga(9), two equivalent Ga(10), and two equivalent Ga(15) atoms. In the third Ni site, Ni(3) is bonded in a 10-coordinate geometry to two equivalent U(2), one Ga(12), one Ga(13), one Ga(15), one Ga(6), two equivalent Ga(18), and two equivalent Ga(9) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Ni(5), one Ga(10), one Ga(17), one Ga(5), two equivalent Ga(14), and two equivalent Ga(20) atoms. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(4), two equivalent Ni(7), one Ga(11), one Ga(14), one Ga(19), one Ga(20), two equivalent Ga(17), and two equivalent Ga(5) atoms to form distorted face-sharing NiGa8Ni4 cuboctahedra. In the sixth Ni site, Ni(6) is bonded in a 9-coordinate geometry to two equivalent U(2), one Ga(13), one Ga(19), one Ga(3), two equivalent Ga(1), and two equivalent Ga(16) atoms. In the seventh Ni site, Ni(7) is bonded in a 9-coordinate geometry to two equivalent Ni(5), one Ga(1), one Ga(17), one Ga(5), two equivalent Ga(11), and two equivalent Ga(19) atoms. In the eighth Ni site, Ni(8) is bonded in a 9-coordinate geometry to two equivalent U(3), one Ga(16), one Ga(20), one Ga(9), two equivalent Ga(10), and two equivalent Ga(13) atoms. In the ninth Ni site, Ni(9) is bonded in a 7-coordinate geometry to two equivalent U(4), one Ga(17), one Ga(18), one Ga(2), two equivalent Ga(6), and two equivalent Ga(8) atoms. In the tenth Ni site, Ni(10) is bonded in a 9-coordinate geometry to two equivalent U(4), one Ga(11), one Ga(18), one Ga(3), two equivalent Ga(1), and two equivalent Ga(12) atoms. In the eleventh Ni site, Ni(11) is bonded in a 7-coordinate geometry to two equivalent U(1), one Ga(5), one Ga(7), one Ga(8), two equivalent Ga(2), and two equivalent Ga(4) atoms. There are twenty inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 5-coordinate geometry to one U(2), one U(4), one Ni(7), two equivalent Ni(10), two equivalent Ni(6), one Ga(12), and one Ga(16) atom. In the second Ga site, Ga(2) is bonded in a 5-coordinate geometry to one U(1), two equivalent U(4), one Ni(9), two equivalent Ni(11), one Ga(4), and two equivalent Ga(8) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one U(3), one Ni(10), one Ni(6), two equivalent Ni(1), one Ga(7), two equivalent Ga(12), and two equivalent Ga(16) atoms. In the fourth Ga site, Ga(4) is bonded in a 8-coordinate geometry to one U(1), two equivalent U(3), one Ni(1), two equivalent Ni(11), one Ga(2), one Ga(20), and two equivalent Ga(7) atoms. In the fifth Ga site, Ga(5) is bonded in a 3-coordinate geometry to one U(4), one Ni(11), one Ni(4), one Ni(7), and two equivalent Ni(5) atoms. In the sixth Ga site, Ga(6) is bonded in a 8-coordinate geometry to one U(4), two equivalent U(2), one Ni(3), two equivalent Ni(9), one Ga(19), one Ga(8), and two equivalent Ga(18) atoms. In the seventh Ga site, Ga(7) is bonded in a 12-coordinate geometry to one U(3), two equivalent U(1), one Ni(11), one Ni(2), two equivalent Ni(1), one Ga(3), two equivalent Ga(15), and two equivalent Ga(4) atoms. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one U(4), two equivalent U(1), one Ni(11), two equivalent Ni(9), one Ga(14), one Ga(6), and two equivalent Ga(2) atoms. In the ninth Ga site, Ga(9) is bonded in a 10-coordinate geometry to one U(2), one Ni(2), one Ni(8), two equivalent Ni(3), one Ga(18), two equivalent Ga(13), and two equivalent Ga(15) atoms. In the tenth Ga site, Ga(10) is bonded in a 5-coordinate geometry to one U(1), one U(3), one Ni(4), two equivalent Ni(2), two equivalent Ni(8), one Ga(13), and one Ga(15) atom. In the eleventh Ga site, Ga(11) is bonded in a 6-coordinate geometry to two equivalent U(4), one Ni(10), one Ni(5), and two equivalent Ni(7) atoms. In the twelfth Ga site, Ga(12) is bonded in a 11-coordinate geometry to one U(4), one Ni(1), one Ni(3), two equivalent Ni(10), one Ga(1), one Ga(15), two equivalent Ga(18), and two equivalent Ga(3) atoms. In the thirteenth Ga site, Ga(13) is bonded in a 12-coordinate geometry to one U(3), two equivalent U(2), one Ni(3), one Ni(6), two equivalent Ni(8), one Ga(10), two equivalent Ga(16), and two equivalent Ga(9) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 6-coordinate geometry to two equivalent U(1), one Ni(2), one Ni(5), two equivalent Ni(4), and one Ga(8) atom. In the fifteenth Ga site, Ga(15) is bonded in a 11-coordinate geometry to one U(1), one Ni(1), one Ni(3), two equivalent Ni(2), one Ga(10), one Ga(12), two equivalent Ga(7), and two equivalent Ga(9) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 12-coordinate geometry to one U(2), two equivalent U(3), one Ni(1), one Ni(8), two equivalent Ni(6), one Ga(1), two equivalent Ga(13), and two equivalent Ga(3) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 3-coordinate geometry to one U(1), one Ni(4), one Ni(7), one Ni(9), and two equivalent Ni(5) atoms. In the eighteenth Ga site, Ga(18) is bonded in a 12-coordinate geometry to one U(2), two equivalent U(4), one Ni(10), one Ni(9), two equivalent Ni(3), one Ga(9), two equivalent Ga(12), and two equivalent Ga(6) atoms. In the nineteenth Ga site, Ga(19) is bonded in a 6-coordinate geometry to two equivalent U(2), one Ni(5), one Ni(6), two equivalent Ni(7), and one Ga(6) atom. In the twentieth Ga site, Ga(20) is bonded in a 6-coordinate geometry to two equivalent U(3), one Ni(5), one Ni(8), two equivalent Ni(4), and one Ga(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_U4Ga20Ni11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.122
_cell_length_b   10.571
_cell_length_c   12.881
_cell_angle_alpha   80.936
_cell_angle_beta   80.834
_cell_angle_gamma   78.801
_symmetry_Int_Tables_number   1
_cell_volume   538.953
_cell_formula_units_Z   1
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
  U  U0  1  0.120  0.093  0.669  1.0
  U  U1  1  0.229  0.367  0.177  1.0
  U  U2  1  0.778  0.632  0.822  1.0
  U  U3  1  0.888  0.904  0.331  1.0
  Ga  Ga4  1  0.070  0.666  0.203  1.0
  Ga  Ga5  1  0.301  0.903  0.500  1.0
  Ga  Ga6  1  0.603  0.796  0.004  1.0
  Ga  Ga7  1  0.258  0.793  0.702  1.0
  Ga  Ga8  1  0.890  0.671  0.549  1.0
  Ga  Ga9  1  0.747  0.206  0.298  1.0
  Ga  Ga10  1  0.632  0.940  0.807  1.0
  Ga  Ga11  1  0.701  0.098  0.499  1.0
  Ga  Ga12  1  0.403  0.206  0.995  1.0
  Ga  Ga13  1  0.934  0.335  0.794  1.0
  Ga  Ga14  1  0.464  0.703  0.378  1.0
  Ga  Ga15  1  0.998  0.922  0.088  1.0
  Ga  Ga16  1  0.804  0.392  0.003  1.0
  Ga  Ga17  1  0.543  0.296  0.622  1.0
  Ga  Ga18  1  0.006  0.080  0.910  1.0
  Ga  Ga19  1  0.200  0.607  0.998  1.0
  Ga  Ga20  1  0.106  0.329  0.451  1.0
  Ga  Ga21  1  0.379  0.060  0.195  1.0
  Ga  Ga22  1  0.613  0.471  0.308  1.0
  Ga  Ga23  1  0.396  0.528  0.690  1.0
  Ni  Ni24  1  0.140  0.839  0.893  1.0
  Ni  Ni25  1  0.501  0.180  0.808  1.0
  Ni  Ni26  1  0.872  0.160  0.106  1.0
  Ni  Ni27  1  0.979  0.436  0.611  1.0
  Ni  Ni28  1  0.503  0.499  0.499  1.0
  Ni  Ni29  1  0.659  0.576  0.113  1.0
  Ni  Ni30  1  0.027  0.564  0.387  1.0
  Ni  Ni31  1  0.343  0.426  0.886  1.0
  Ni  Ni32  1  0.245  0.120  0.386  1.0
  Ni  Ni33  1  0.501  0.821  0.190  1.0
  Ni  Ni34  1  0.756  0.882  0.613  1.0
[/CIF]
.