The structure described by Nd4Br9 crystallizes in the monoclinic Pc space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to one Br(1), one Br(11), one Br(14), one Br(15), one Br(16), one Br(17), and one Br(2) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the second Nd site, Nd(2) is bonded to one Br(1), one Br(11), one Br(12), one Br(14), one Br(15), one Br(17), and one Br(2) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the third Nd site, Nd(3) is bonded in a 8-coordinate geometry to one Br(11), one Br(13), one Br(14), one Br(2), one Br(4), one Br(5), one Br(8), and one Br(9) atom. In the fourth Nd site, Nd(4) is bonded to one Br(10), one Br(12), one Br(16), one Br(17), one Br(18), one Br(3), and one Br(6) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the fifth Nd site, Nd(5) is bonded to one Br(1), one Br(10), one Br(12), one Br(16), one Br(18), one Br(3), and one Br(6) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the sixth Nd site, Nd(6) is bonded in a 8-coordinate geometry to one Br(11), one Br(13), one Br(15), one Br(2), one Br(4), one Br(5), one Br(7), and one Br(8) atom. In the seventh Nd site, Nd(7) is bonded in a 8-coordinate geometry to one Br(13), one Br(18), one Br(3), one Br(4), one Br(5), one Br(6), one Br(7), and one Br(9) atom. In the eighth Nd site, Nd(8) is bonded in a 8-coordinate geometry to one Br(10), one Br(18), one Br(4), one Br(5), one Br(6), one Br(7), one Br(8), and one Br(9) atom. There are eighteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(2), and one Nd(5) atom. In the second Br site, Br(2) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(6) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the third Br site, Br(3) is bonded in a distorted trigonal planar geometry to one Nd(4), one Nd(5), and one Nd(7) atom. In the fourth Br site, Br(4) is bonded to one Nd(3), one Nd(6), one Nd(7), and one Nd(8) atom to form a mixture of corner and edge-sharing BrNd4 trigonal pyramids. In the fifth Br site, Br(5) is bonded to one Nd(3), one Nd(6), one Nd(7), and one Nd(8) atom to form a mixture of corner and edge-sharing BrNd4 trigonal pyramids. In the sixth Br site, Br(6) is bonded to one Nd(4), one Nd(5), one Nd(7), and one Nd(8) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the seventh Br site, Br(7) is bonded in a distorted trigonal non-coplanar geometry to one Nd(6), one Nd(7), and one Nd(8) atom. In the eighth Br site, Br(8) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(6), and one Nd(8) atom. In the ninth Br site, Br(9) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(7), and one Nd(8) atom. In the tenth Br site, Br(10) is bonded in a distorted trigonal planar geometry to one Nd(4), one Nd(5), and one Nd(8) atom. In the eleventh Br site, Br(11) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(6) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the twelfth Br site, Br(12) is bonded in a trigonal non-coplanar geometry to one Nd(2), one Nd(4), and one Nd(5) atom. In the thirteenth Br site, Br(13) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(6), and one Nd(7) atom. In the fourteenth Br site, Br(14) is bonded in a distorted trigonal planar geometry to one Nd(1), one Nd(2), and one Nd(3) atom. In the fifteenth Br site, Br(15) is bonded in a distorted trigonal planar geometry to one Nd(1), one Nd(2), and one Nd(6) atom. In the sixteenth Br site, Br(16) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(4), and one Nd(5) atom. In the seventeenth Br site, Br(17) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(2), and one Nd(4) atom. In the eighteenth Br site, Br(18) is bonded to one Nd(4), one Nd(5), one Nd(7), and one Nd(8) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd4Br9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.156
_cell_length_b   7.655
_cell_length_c   29.379
_cell_angle_alpha   89.584
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1609.307
_cell_formula_units_Z   4
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
  Nd  Nd0  1  0.477  0.160  0.429  1.0
  Nd  Nd1  1  0.040  0.659  0.431  1.0
  Nd  Nd2  1  0.971  0.305  0.806  1.0
  Nd  Nd3  1  0.523  0.160  0.929  1.0
  Nd  Nd4  1  0.458  0.848  0.071  1.0
  Nd  Nd5  1  0.025  0.349  0.070  1.0
  Nd  Nd6  1  0.493  0.814  0.308  1.0
  Nd  Nd7  1  0.542  0.848  0.571  1.0
  Nd  Nd8  1  0.483  0.205  0.194  1.0
  Nd  Nd9  1  0.507  0.814  0.808  1.0
  Nd  Nd10  1  0.029  0.305  0.306  1.0
  Nd  Nd11  1  0.975  0.349  0.570  1.0
  Nd  Nd12  1  0.022  0.703  0.192  1.0
  Nd  Nd13  1  0.960  0.659  0.931  1.0
  Nd  Nd14  1  0.978  0.703  0.692  1.0
  Nd  Nd15  1  0.517  0.205  0.694  1.0
  Br  Br16  1  0.239  0.389  0.490  1.0
  Br  Br17  1  0.185  0.978  0.371  1.0
  Br  Br18  1  0.667  0.167  0.101  1.0
  Br  Br19  1  0.333  0.167  0.601  1.0
  Br  Br20  1  0.193  0.002  0.250  1.0
  Br  Br21  1  0.320  0.511  0.250  1.0
  Br  Br22  1  0.322  0.527  0.129  1.0
  Br  Br23  1  0.367  0.847  0.705  1.0
  Br  Br24  1  0.119  0.664  0.795  1.0
  Br  Br25  1  0.678  0.527  0.629  1.0
  Br  Br26  1  0.680  0.511  0.750  1.0
  Br  Br27  1  0.882  0.341  0.204  1.0
  Br  Br28  1  0.881  0.664  0.295  1.0
  Br  Br29  1  0.177  0.670  0.601  1.0
  Br  Br30  1  0.332  0.481  0.371  1.0
  Br  Br31  1  0.761  0.389  0.990  1.0
  Br  Br32  1  0.771  0.611  0.510  1.0
  Br  Br33  1  0.229  0.611  0.010  1.0
  Br  Br34  1  0.630  0.175  0.295  1.0
  Br  Br35  1  0.837  0.341  0.398  1.0
  Br  Br36  1  0.313  0.844  0.899  1.0
  Br  Br37  1  0.744  0.111  0.510  1.0
  Br  Br38  1  0.807  0.002  0.750  1.0
  Br  Br39  1  0.668  0.481  0.871  1.0
  Br  Br40  1  0.163  0.341  0.898  1.0
  Br  Br41  1  0.717  0.890  0.990  1.0
  Br  Br42  1  0.118  0.341  0.704  1.0
  Br  Br43  1  0.370  0.175  0.795  1.0
  Br  Br44  1  0.815  0.978  0.871  1.0
  Br  Br45  1  0.633  0.847  0.205  1.0
  Br  Br46  1  0.687  0.844  0.399  1.0
  Br  Br47  1  0.172  0.034  0.130  1.0
  Br  Br48  1  0.283  0.890  0.490  1.0
  Br  Br49  1  0.823  0.670  0.101  1.0
  Br  Br50  1  0.256  0.111  0.010  1.0
  Br  Br51  1  0.828  0.034  0.630  1.0
[/CIF]
.
The structure described by Nd4Br9 crystallizes in the monoclinic Pc space group. There are eight inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to one Br(1), one Br(11), one Br(14), one Br(15), one Br(16), one Br(17), and one Br(2) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the second Nd site, Nd(2) is bonded to one Br(1), one Br(11), one Br(12), one Br(14), one Br(15), one Br(17), and one Br(2) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the third Nd site, Nd(3) is bonded in a 8-coordinate geometry to one Br(11), one Br(13), one Br(14), one Br(2), one Br(4), one Br(5), one Br(8), and one Br(9) atom. In the fourth Nd site, Nd(4) is bonded to one Br(10), one Br(12), one Br(16), one Br(17), one Br(18), one Br(3), and one Br(6) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the fifth Nd site, Nd(5) is bonded to one Br(1), one Br(10), one Br(12), one Br(16), one Br(18), one Br(3), and one Br(6) atom to form a mixture of distorted corner and edge-sharing NdBr7 pentagonal bipyramids. In the sixth Nd site, Nd(6) is bonded in a 8-coordinate geometry to one Br(11), one Br(13), one Br(15), one Br(2), one Br(4), one Br(5), one Br(7), and one Br(8) atom. In the seventh Nd site, Nd(7) is bonded in a 8-coordinate geometry to one Br(13), one Br(18), one Br(3), one Br(4), one Br(5), one Br(6), one Br(7), and one Br(9) atom. In the eighth Nd site, Nd(8) is bonded in a 8-coordinate geometry to one Br(10), one Br(18), one Br(4), one Br(5), one Br(6), one Br(7), one Br(8), and one Br(9) atom. There are eighteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(2), and one Nd(5) atom. In the second Br site, Br(2) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(6) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the third Br site, Br(3) is bonded in a distorted trigonal planar geometry to one Nd(4), one Nd(5), and one Nd(7) atom. In the fourth Br site, Br(4) is bonded to one Nd(3), one Nd(6), one Nd(7), and one Nd(8) atom to form a mixture of corner and edge-sharing BrNd4 trigonal pyramids. In the fifth Br site, Br(5) is bonded to one Nd(3), one Nd(6), one Nd(7), and one Nd(8) atom to form a mixture of corner and edge-sharing BrNd4 trigonal pyramids. In the sixth Br site, Br(6) is bonded to one Nd(4), one Nd(5), one Nd(7), and one Nd(8) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the seventh Br site, Br(7) is bonded in a distorted trigonal non-coplanar geometry to one Nd(6), one Nd(7), and one Nd(8) atom. In the eighth Br site, Br(8) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(6), and one Nd(8) atom. In the ninth Br site, Br(9) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(7), and one Nd(8) atom. In the tenth Br site, Br(10) is bonded in a distorted trigonal planar geometry to one Nd(4), one Nd(5), and one Nd(8) atom. In the eleventh Br site, Br(11) is bonded to one Nd(1), one Nd(2), one Nd(3), and one Nd(6) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. In the twelfth Br site, Br(12) is bonded in a trigonal non-coplanar geometry to one Nd(2), one Nd(4), and one Nd(5) atom. In the thirteenth Br site, Br(13) is bonded in a distorted trigonal non-coplanar geometry to one Nd(3), one Nd(6), and one Nd(7) atom. In the fourteenth Br site, Br(14) is bonded in a distorted trigonal planar geometry to one Nd(1), one Nd(2), and one Nd(3) atom. In the fifteenth Br site, Br(15) is bonded in a distorted trigonal planar geometry to one Nd(1), one Nd(2), and one Nd(6) atom. In the sixteenth Br site, Br(16) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(4), and one Nd(5) atom. In the seventeenth Br site, Br(17) is bonded in a trigonal non-coplanar geometry to one Nd(1), one Nd(2), and one Nd(4) atom. In the eighteenth Br site, Br(18) is bonded to one Nd(4), one Nd(5), one Nd(7), and one Nd(8) atom to form a mixture of distorted corner and edge-sharing BrNd4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Nd4Br9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.156
_cell_length_b   7.655
_cell_length_c   29.379
_cell_angle_alpha   89.584
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1609.307
_cell_formula_units_Z   4
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
  Nd  Nd0  1  0.477  0.160  0.429  1.0
  Nd  Nd1  1  0.040  0.659  0.431  1.0
  Nd  Nd2  1  0.971  0.305  0.806  1.0
  Nd  Nd3  1  0.523  0.160  0.929  1.0
  Nd  Nd4  1  0.458  0.848  0.071  1.0
  Nd  Nd5  1  0.025  0.349  0.070  1.0
  Nd  Nd6  1  0.493  0.814  0.308  1.0
  Nd  Nd7  1  0.542  0.848  0.571  1.0
  Nd  Nd8  1  0.483  0.205  0.194  1.0
  Nd  Nd9  1  0.507  0.814  0.808  1.0
  Nd  Nd10  1  0.029  0.305  0.306  1.0
  Nd  Nd11  1  0.975  0.349  0.570  1.0
  Nd  Nd12  1  0.022  0.703  0.192  1.0
  Nd  Nd13  1  0.960  0.659  0.931  1.0
  Nd  Nd14  1  0.978  0.703  0.692  1.0
  Nd  Nd15  1  0.517  0.205  0.694  1.0
  Br  Br16  1  0.239  0.389  0.490  1.0
  Br  Br17  1  0.185  0.978  0.371  1.0
  Br  Br18  1  0.667  0.167  0.101  1.0
  Br  Br19  1  0.333  0.167  0.601  1.0
  Br  Br20  1  0.193  0.002  0.250  1.0
  Br  Br21  1  0.320  0.511  0.250  1.0
  Br  Br22  1  0.322  0.527  0.129  1.0
  Br  Br23  1  0.367  0.847  0.705  1.0
  Br  Br24  1  0.119  0.664  0.795  1.0
  Br  Br25  1  0.678  0.527  0.629  1.0
  Br  Br26  1  0.680  0.511  0.750  1.0
  Br  Br27  1  0.882  0.341  0.204  1.0
  Br  Br28  1  0.881  0.664  0.295  1.0
  Br  Br29  1  0.177  0.670  0.601  1.0
  Br  Br30  1  0.332  0.481  0.371  1.0
  Br  Br31  1  0.761  0.389  0.990  1.0
  Br  Br32  1  0.771  0.611  0.510  1.0
  Br  Br33  1  0.229  0.611  0.010  1.0
  Br  Br34  1  0.630  0.175  0.295  1.0
  Br  Br35  1  0.837  0.341  0.398  1.0
  Br  Br36  1  0.313  0.844  0.899  1.0
  Br  Br37  1  0.744  0.111  0.510  1.0
  Br  Br38  1  0.807  0.002  0.750  1.0
  Br  Br39  1  0.668  0.481  0.871  1.0
  Br  Br40  1  0.163  0.341  0.898  1.0
  Br  Br41  1  0.717  0.890  0.990  1.0
  Br  Br42  1  0.118  0.341  0.704  1.0
  Br  Br43  1  0.370  0.175  0.795  1.0
  Br  Br44  1  0.815  0.978  0.871  1.0
  Br  Br45  1  0.633  0.847  0.205  1.0
  Br  Br46  1  0.687  0.844  0.399  1.0
  Br  Br47  1  0.172  0.034  0.130  1.0
  Br  Br48  1  0.283  0.890  0.490  1.0
  Br  Br49  1  0.823  0.670  0.101  1.0
  Br  Br50  1  0.256  0.111  0.010  1.0
  Br  Br51  1  0.828  0.034  0.630  1.0
[/CIF]
.