The structure described by Ba2MgNdSbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Ba site, Ba(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted BaO6 octahedra that share corners with three equivalent Nd(1)O6 octahedra and  a faceface with one Nd(1)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. Mg(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. Nd(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NdO6 octahedra that share corners with three equivalent Ba(2)O6 octahedra and  a faceface with one Ba(2)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. Sb(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. is represented by the CIF file [CIF]
data_Ba2NdMgSbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.406
_cell_length_b   7.406
_cell_length_c   7.402
_cell_angle_alpha   49.616
_cell_angle_beta   49.608
_cell_angle_gamma   49.607
_symmetry_Int_Tables_number   1
_cell_volume   216.560
_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
  Ba  Ba0  1  0.728  0.726  0.728  1.0
  Ba  Ba1  1  0.180  0.179  0.180  1.0
  Nd  Nd2  1  0.995  0.994  0.995  1.0
  Mg  Mg3  1  0.399  0.397  0.398  1.0
  Sb  Sb4  1  0.551  0.550  0.551  1.0
  O  O5  1  0.623  0.310  0.868  1.0
  O  O6  1  0.309  0.868  0.623  1.0
  O  O7  1  0.867  0.623  0.308  1.0
  O  O8  1  0.313  0.754  0.155  1.0
  O  O9  1  0.154  0.311  0.755  1.0
  O  O10  1  0.755  0.153  0.313  1.0
[/CIF]
.
The structure described by Ba2MgNdSbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the second Ba site, Ba(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted BaO6 octahedra that share corners with three equivalent Nd(1)O6 octahedra and  a faceface with one Nd(1)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. Mg(1) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. Nd(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NdO6 octahedra that share corners with three equivalent Ba(2)O6 octahedra and  a faceface with one Ba(2)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. Sb(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. is represented by the CIF file [CIF]
data_Ba2NdMgSbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.406
_cell_length_b   7.406
_cell_length_c   7.402
_cell_angle_alpha   49.616
_cell_angle_beta   49.608
_cell_angle_gamma   49.607
_symmetry_Int_Tables_number   1
_cell_volume   216.560
_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
  Ba  Ba0  1  0.728  0.726  0.728  1.0
  Ba  Ba1  1  0.180  0.179  0.180  1.0
  Nd  Nd2  1  0.995  0.994  0.995  1.0
  Mg  Mg3  1  0.399  0.397  0.398  1.0
  Sb  Sb4  1  0.551  0.550  0.551  1.0
  O  O5  1  0.623  0.310  0.868  1.0
  O  O6  1  0.309  0.868  0.623  1.0
  O  O7  1  0.867  0.623  0.308  1.0
  O  O8  1  0.313  0.754  0.155  1.0
  O  O9  1  0.154  0.311  0.755  1.0
  O  O10  1  0.755  0.153  0.313  1.0
[/CIF]
.