The structure described by Al8Cu4Nd crystallizes in the monoclinic C2/m space group. Nd(1) is bonded in a 20-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), two equivalent Al(3), two equivalent Al(4), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Nd(1), two equivalent Cu(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms to form a mixture of distorted edge, face, and corner-sharing CuNd2Al8Cu2 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Nd(1), two equivalent Cu(1), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms to form a mixture of distorted edge, face, and corner-sharing CuNd2Al8Cu2 cuboctahedra. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(4) atoms. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Nd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(3), two equivalent Al(1), and two equivalent Al(2) atoms. In the fourth Al site, Al(4) is bonded in a 10-coordinate geometry to one Nd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(4), two equivalent Al(1), and two equivalent Al(2) atoms. is represented by the CIF file [CIF]
data_Nd(Al2Cu)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.124
_cell_length_b   6.722
_cell_length_c   6.722
_cell_angle_alpha   98.499
_cell_angle_beta   67.461
_cell_angle_gamma   112.539
_symmetry_Int_Tables_number   1
_cell_volume   197.496
_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
  Nd  Nd0  1  0.000  1.000  1.000  1.0
  Al  Al1  1  0.500  0.221  0.221  1.0
  Al  Al2  1  0.279  0.779  0.221  1.0
  Al  Al3  1  0.000  0.349  0.349  1.0
  Al  Al4  1  0.650  0.651  0.349  1.0
  Al  Al5  1  0.350  0.349  0.651  1.0
  Al  Al6  1  1.000  0.651  0.651  1.0
  Al  Al7  1  0.500  0.779  0.779  1.0
  Al  Al8  1  0.721  0.221  0.779  1.0
  Cu  Cu9  1  0.000  0.500  0.000  1.0
  Cu  Cu10  1  0.500  0.500  0.000  1.0
  Cu  Cu11  1  0.000  0.000  0.500  1.0
  Cu  Cu12  1  0.500  1.000  0.500  1.0
[/CIF]
.
The structure described by Al8Cu4Nd crystallizes in the monoclinic C2/m space group. Nd(1) is bonded in a 20-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), two equivalent Al(3), two equivalent Al(4), four equivalent Al(1), and four equivalent Al(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent Nd(1), two equivalent Cu(2), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms to form a mixture of distorted edge, face, and corner-sharing CuNd2Al8Cu2 cuboctahedra. In the second Cu site, Cu(2) is bonded to two equivalent Nd(1), two equivalent Cu(1), two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms to form a mixture of distorted edge, face, and corner-sharing CuNd2Al8Cu2 cuboctahedra. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. In the second Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent Nd(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(4) atoms. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Nd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(3), two equivalent Al(1), and two equivalent Al(2) atoms. In the fourth Al site, Al(4) is bonded in a 10-coordinate geometry to one Nd(1), two equivalent Cu(1), two equivalent Cu(2), one Al(4), two equivalent Al(1), and two equivalent Al(2) atoms. is represented by the CIF file [CIF]
data_Nd(Al2Cu)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.124
_cell_length_b   6.722
_cell_length_c   6.722
_cell_angle_alpha   98.499
_cell_angle_beta   67.461
_cell_angle_gamma   112.539
_symmetry_Int_Tables_number   1
_cell_volume   197.496
_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
  Nd  Nd0  1  0.000  1.000  1.000  1.0
  Al  Al1  1  0.500  0.221  0.221  1.0
  Al  Al2  1  0.279  0.779  0.221  1.0
  Al  Al3  1  0.000  0.349  0.349  1.0
  Al  Al4  1  0.650  0.651  0.349  1.0
  Al  Al5  1  0.350  0.349  0.651  1.0
  Al  Al6  1  1.000  0.651  0.651  1.0
  Al  Al7  1  0.500  0.779  0.779  1.0
  Al  Al8  1  0.721  0.221  0.779  1.0
  Cu  Cu9  1  0.000  0.500  0.000  1.0
  Cu  Cu10  1  0.500  0.500  0.000  1.0
  Cu  Cu11  1  0.000  0.000  0.500  1.0
  Cu  Cu12  1  0.500  1.000  0.500  1.0
[/CIF]
.