The crystal structure described by Nd3Pt7Sb4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to two equivalent Pt(2), four equivalent Pt(1), two equivalent Sb(1), and four equivalent Sb(2) atoms to form distorted NdSb6Pt6 cuboctahedra that share edges with two equivalent Pt(3)Nd4Sb2Pt6 cuboctahedra and faces with two equivalent Nd(1)Sb6Pt6 cuboctahedra. In the second Nd site, Nd(2) is bonded in a 12-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Sb(1), and three equivalent Sb(2) atoms. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), one Sb(2), and three equivalent Sb(1) atoms. In the second Pt site, Pt(2) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Nd(2), one Pt(3), and three equivalent Sb(2) atoms. In the third Pt site, Pt(3) is bonded to four equivalent Nd(2), two equivalent Pt(2), four equivalent Pt(4), and two equivalent Sb(1) atoms to form distorted PtNd4Sb2Pt6 cuboctahedra that share edges with two equivalent Nd(1)Sb6Pt6 cuboctahedra and faces with two equivalent Pt(3)Nd4Sb2Pt6 cuboctahedra. In the fourth Pt site, Pt(4) is bonded in a 5-coordinate geometry to two equivalent Nd(2), two equivalent Pt(3), one Sb(2), and two equivalent Sb(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Nd(1), two equivalent Nd(2), one Pt(3), two equivalent Pt(4), and three equivalent Pt(1) atoms. In the second Sb site, Sb(2) is bonded in a 10-coordinate geometry to two equivalent Nd(1), three equivalent Nd(2), one Pt(1), one Pt(4), and three equivalent Pt(2) atoms. is represented by the CIF file [CIF]
data_Nd3Sb4Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.605
_cell_length_b   8.605
_cell_length_c   10.477
_cell_angle_alpha   52.637
_cell_angle_beta   52.637
_cell_angle_gamma   28.976
_symmetry_Int_Tables_number   1
_cell_volume   292.823
_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  0.500  0.500  0.000  1.0
  Nd  Nd1  1  0.828  0.828  0.684  1.0
  Nd  Nd2  1  0.172  0.172  0.316  1.0
  Sb  Sb3  1  0.638  0.638  0.592  1.0
  Sb  Sb4  1  0.172  0.172  0.975  1.0
  Sb  Sb5  1  0.828  0.828  0.025  1.0
  Sb  Sb6  1  0.362  0.362  0.408  1.0
  Pt  Pt7  1  0.829  0.829  0.272  1.0
  Pt  Pt8  1  0.623  0.623  0.154  1.0
  Pt  Pt9  1  0.500  0.500  0.500  1.0
  Pt  Pt10  1  0.171  0.171  0.728  1.0
  Pt  Pt11  1  0.984  0.984  0.321  1.0
  Pt  Pt12  1  0.016  0.016  0.679  1.0
  Pt  Pt13  1  0.377  0.377  0.846  1.0
[/CIF]
.
The crystal structure described by Nd3Pt7Sb4 crystallizes in the monoclinic C2/m space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to two equivalent Pt(2), four equivalent Pt(1), two equivalent Sb(1), and four equivalent Sb(2) atoms to form distorted NdSb6Pt6 cuboctahedra that share edges with two equivalent Pt(3)Nd4Sb2Pt6 cuboctahedra and faces with two equivalent Nd(1)Sb6Pt6 cuboctahedra. In the second Nd site, Nd(2) is bonded in a 12-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), two equivalent Pt(4), two equivalent Sb(1), and three equivalent Sb(2) atoms. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 8-coordinate geometry to two equivalent Nd(1), two equivalent Nd(2), one Sb(2), and three equivalent Sb(1) atoms. In the second Pt site, Pt(2) is bonded in a 6-coordinate geometry to one Nd(1), two equivalent Nd(2), one Pt(3), and three equivalent Sb(2) atoms. In the third Pt site, Pt(3) is bonded to four equivalent Nd(2), two equivalent Pt(2), four equivalent Pt(4), and two equivalent Sb(1) atoms to form distorted PtNd4Sb2Pt6 cuboctahedra that share edges with two equivalent Nd(1)Sb6Pt6 cuboctahedra and faces with two equivalent Pt(3)Nd4Sb2Pt6 cuboctahedra. In the fourth Pt site, Pt(4) is bonded in a 5-coordinate geometry to two equivalent Nd(2), two equivalent Pt(3), one Sb(2), and two equivalent Sb(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 9-coordinate geometry to one Nd(1), two equivalent Nd(2), one Pt(3), two equivalent Pt(4), and three equivalent Pt(1) atoms. In the second Sb site, Sb(2) is bonded in a 10-coordinate geometry to two equivalent Nd(1), three equivalent Nd(2), one Pt(1), one Pt(4), and three equivalent Pt(2) atoms. is represented by the CIF file [CIF]
data_Nd3Sb4Pt7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.605
_cell_length_b   8.605
_cell_length_c   10.477
_cell_angle_alpha   52.637
_cell_angle_beta   52.637
_cell_angle_gamma   28.976
_symmetry_Int_Tables_number   1
_cell_volume   292.823
_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  0.500  0.500  0.000  1.0
  Nd  Nd1  1  0.828  0.828  0.684  1.0
  Nd  Nd2  1  0.172  0.172  0.316  1.0
  Sb  Sb3  1  0.638  0.638  0.592  1.0
  Sb  Sb4  1  0.172  0.172  0.975  1.0
  Sb  Sb5  1  0.828  0.828  0.025  1.0
  Sb  Sb6  1  0.362  0.362  0.408  1.0
  Pt  Pt7  1  0.829  0.829  0.272  1.0
  Pt  Pt8  1  0.623  0.623  0.154  1.0
  Pt  Pt9  1  0.500  0.500  0.500  1.0
  Pt  Pt10  1  0.171  0.171  0.728  1.0
  Pt  Pt11  1  0.984  0.984  0.321  1.0
  Pt  Pt12  1  0.016  0.016  0.679  1.0
  Pt  Pt13  1  0.377  0.377  0.846  1.0
[/CIF]
.