The structure described by Nd2Mn3Sb3O14 crystallizes in the monoclinic C2/m space group. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form NdO8 hexagonal bipyramids that share edges with two equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(2)O8 hexagonal bipyramids, edges with two equivalent Mn(3)O8 hexagonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, edges with two equivalent Mn(3)O8 hexagonal bipyramids, and edges with four equivalent Nd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 48-53°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(5) atoms to form distorted MnO8 hexagonal bipyramids that share edges with two equivalent Mn(3)O8 hexagonal bipyramids, edges with four equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Sb(2)O6 octahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(4) atoms to form distorted MnO8 hexagonal bipyramids that share edges with two equivalent Mn(2)O8 hexagonal bipyramids, edges with four equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Sb(2)O6 octahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, edges with two equivalent Mn(2)O8 hexagonal bipyramids, and edges with four equivalent Nd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-53°. In the second Sb site, Sb(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(2)O8 hexagonal bipyramids, and edges with two equivalent Mn(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-48°. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Nd(1), one Mn(2), and one Mn(3) atom to form ONd2Mn2 tetrahedra that share corners with two equivalent O(2)Nd2MnSb tetrahedra, corners with four equivalent O(1)Nd2Mn2 tetrahedra, corners with four equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(2)Nd2MnSb tetrahedra, and edges with two equivalent O(5)NdMnSb2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Nd(1), one Mn(1), and one Sb(1) atom to form distorted ONd2MnSb tetrahedra that share corners with two equivalent O(1)Nd2Mn2 tetrahedra, corners with four equivalent O(2)Nd2MnSb tetrahedra, corners with four equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(1)Nd2Mn2 tetrahedra, and edges with two equivalent O(5)NdMnSb2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mn(2), one Mn(3), and two equivalent Sb(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Nd(1), one Mn(1), one Mn(3), and one Sb(2) atom. In the fifth O site, O(5) is bonded to one Nd(1), one Mn(2), one Sb(1), and one Sb(2) atom to form distorted ONdMnSb2 tetrahedra that share corners with two equivalent O(1)Nd2Mn2 tetrahedra, corners with two equivalent O(2)Nd2MnSb tetrahedra, corners with six equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(1)Nd2Mn2 tetrahedra,  an edgeedge with one O(2)Nd2MnSb tetrahedra, and  an edgeedge with one O(5)NdMnSb2 tetrahedra. is represented by the CIF file [CIF]
data_Nd2Mn3Sb3O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.273
_cell_length_b   7.273
_cell_length_c   7.373
_cell_angle_alpha   60.990
_cell_angle_beta   60.990
_cell_angle_gamma   61.467
_symmetry_Int_Tables_number   1
_cell_volume   282.931
_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  0.000  0.000  1.0
  Nd  Nd1  1  0.000  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.500  0.500  1.0
  Mn  Mn3  1  0.000  0.000  0.000  1.0
  Mn  Mn4  1  0.000  0.000  0.500  1.0
  Sb  Sb5  1  0.500  0.500  0.000  1.0
  Sb  Sb6  1  0.000  0.500  0.500  1.0
  Sb  Sb7  1  0.500  0.000  0.500  1.0
  O  O8  1  0.892  0.892  0.861  1.0
  O  O9  1  0.108  0.108  0.139  1.0
  O  O10  1  0.589  0.589  0.150  1.0
  O  O11  1  0.174  0.174  0.570  1.0
  O  O12  1  0.175  0.572  0.582  1.0
  O  O13  1  0.579  0.173  0.177  1.0
  O  O14  1  0.173  0.579  0.177  1.0
  O  O15  1  0.572  0.175  0.582  1.0
  O  O16  1  0.411  0.411  0.850  1.0
  O  O17  1  0.826  0.826  0.430  1.0
  O  O18  1  0.825  0.428  0.418  1.0
  O  O19  1  0.421  0.827  0.823  1.0
  O  O20  1  0.827  0.421  0.823  1.0
  O  O21  1  0.428  0.825  0.418  1.0
[/CIF]
.
The structure described by Nd2Mn3Sb3O14 crystallizes in the monoclinic C2/m space group. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form NdO8 hexagonal bipyramids that share edges with two equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(2)O8 hexagonal bipyramids, edges with two equivalent Mn(3)O8 hexagonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, and edges with two equivalent Sb(2)O6 octahedra. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, edges with two equivalent Mn(3)O8 hexagonal bipyramids, and edges with four equivalent Nd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 48-53°. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(5) atoms to form distorted MnO8 hexagonal bipyramids that share edges with two equivalent Mn(3)O8 hexagonal bipyramids, edges with four equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Sb(1)O6 octahedra, and edges with four equivalent Sb(2)O6 octahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(4) atoms to form distorted MnO8 hexagonal bipyramids that share edges with two equivalent Mn(2)O8 hexagonal bipyramids, edges with four equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, and edges with four equivalent Sb(2)O6 octahedra. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent O(2) and four equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, edges with two equivalent Mn(2)O8 hexagonal bipyramids, and edges with four equivalent Nd(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-53°. In the second Sb site, Sb(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Sb(1)O6 octahedra, corners with two equivalent Sb(2)O6 octahedra, edges with two equivalent Nd(1)O8 hexagonal bipyramids, edges with two equivalent Mn(2)O8 hexagonal bipyramids, and edges with two equivalent Mn(3)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-48°. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Nd(1), one Mn(2), and one Mn(3) atom to form ONd2Mn2 tetrahedra that share corners with two equivalent O(2)Nd2MnSb tetrahedra, corners with four equivalent O(1)Nd2Mn2 tetrahedra, corners with four equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(2)Nd2MnSb tetrahedra, and edges with two equivalent O(5)NdMnSb2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Nd(1), one Mn(1), and one Sb(1) atom to form distorted ONd2MnSb tetrahedra that share corners with two equivalent O(1)Nd2Mn2 tetrahedra, corners with four equivalent O(2)Nd2MnSb tetrahedra, corners with four equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(1)Nd2Mn2 tetrahedra, and edges with two equivalent O(5)NdMnSb2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mn(2), one Mn(3), and two equivalent Sb(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Nd(1), one Mn(1), one Mn(3), and one Sb(2) atom. In the fifth O site, O(5) is bonded to one Nd(1), one Mn(2), one Sb(1), and one Sb(2) atom to form distorted ONdMnSb2 tetrahedra that share corners with two equivalent O(1)Nd2Mn2 tetrahedra, corners with two equivalent O(2)Nd2MnSb tetrahedra, corners with six equivalent O(5)NdMnSb2 tetrahedra,  an edgeedge with one O(1)Nd2Mn2 tetrahedra,  an edgeedge with one O(2)Nd2MnSb tetrahedra, and  an edgeedge with one O(5)NdMnSb2 tetrahedra. is represented by the CIF file [CIF]
data_Nd2Mn3Sb3O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.273
_cell_length_b   7.273
_cell_length_c   7.373
_cell_angle_alpha   60.990
_cell_angle_beta   60.990
_cell_angle_gamma   61.467
_symmetry_Int_Tables_number   1
_cell_volume   282.931
_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  0.000  0.000  1.0
  Nd  Nd1  1  0.000  0.500  0.000  1.0
  Mn  Mn2  1  0.500  0.500  0.500  1.0
  Mn  Mn3  1  0.000  0.000  0.000  1.0
  Mn  Mn4  1  0.000  0.000  0.500  1.0
  Sb  Sb5  1  0.500  0.500  0.000  1.0
  Sb  Sb6  1  0.000  0.500  0.500  1.0
  Sb  Sb7  1  0.500  0.000  0.500  1.0
  O  O8  1  0.892  0.892  0.861  1.0
  O  O9  1  0.108  0.108  0.139  1.0
  O  O10  1  0.589  0.589  0.150  1.0
  O  O11  1  0.174  0.174  0.570  1.0
  O  O12  1  0.175  0.572  0.582  1.0
  O  O13  1  0.579  0.173  0.177  1.0
  O  O14  1  0.173  0.579  0.177  1.0
  O  O15  1  0.572  0.175  0.582  1.0
  O  O16  1  0.411  0.411  0.850  1.0
  O  O17  1  0.826  0.826  0.430  1.0
  O  O18  1  0.825  0.428  0.418  1.0
  O  O19  1  0.421  0.827  0.823  1.0
  O  O20  1  0.827  0.421  0.823  1.0
  O  O21  1  0.428  0.825  0.418  1.0
[/CIF]
.