The crystal structure described by Ba3MnSb2O9 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(4), two equivalent O(5), three equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with six equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Sb(1)O6 octahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Mn(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-12°. In the second Ba site, Ba(2) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Mn(1)O6 octahedra, and faces with six equivalent Sb(1)O6 octahedra. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 6-15°. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(1)O6 octahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-15°. There are five inequivalent O sites. In the first O site, O(3) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. In the second O site, O(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Sb(1) atoms to form distorted corner-sharing OBa4Sb2 octahedra. The corner-sharing octahedral tilt angles are 8°. In the third O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Sb(1) atoms. In the fourth O site, O(1) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. In the fifth O site, O(2) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Ba3MnSb2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.989
_cell_length_b   5.989
_cell_length_c   14.829
_cell_angle_alpha   89.422
_cell_angle_beta   89.422
_cell_angle_gamma   119.929
_symmetry_Int_Tables_number   1
_cell_volume   460.932
_cell_formula_units_Z   2
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  0.339  0.674  0.412  1.0
  Ba  Ba1  1  0.326  0.661  0.088  1.0
  Ba  Ba2  1  0.661  0.326  0.588  1.0
  Ba  Ba3  1  0.674  0.339  0.912  1.0
  Ba  Ba4  1  0.997  0.003  0.250  1.0
  Ba  Ba5  1  0.003  0.997  0.750  1.0
  Mn  Mn6  1  0.000  0.000  0.000  1.0
  Mn  Mn7  1  0.000  0.000  0.500  1.0
  Sb  Sb8  1  0.678  0.346  0.347  1.0
  Sb  Sb9  1  0.654  0.322  0.153  1.0
  Sb  Sb10  1  0.346  0.678  0.847  1.0
  Sb  Sb11  1  0.322  0.654  0.653  1.0
  O  O12  1  0.854  0.683  0.405  1.0
  O  O13  1  0.317  0.146  0.095  1.0
  O  O14  1  0.146  0.317  0.595  1.0
  O  O15  1  0.683  0.854  0.905  1.0
  O  O16  1  0.368  0.197  0.425  1.0
  O  O17  1  0.803  0.632  0.075  1.0
  O  O18  1  0.632  0.803  0.575  1.0
  O  O19  1  0.197  0.368  0.925  1.0
  O  O20  1  0.856  0.197  0.414  1.0
  O  O21  1  0.803  0.144  0.086  1.0
  O  O22  1  0.144  0.803  0.586  1.0
  O  O23  1  0.197  0.856  0.914  1.0
  O  O24  1  0.482  0.518  0.750  1.0
  O  O25  1  0.518  0.482  0.250  1.0
  O  O26  1  0.040  0.519  0.758  1.0
  O  O27  1  0.481  0.960  0.742  1.0
  O  O28  1  0.960  0.481  0.242  1.0
  O  O29  1  0.519  0.040  0.258  1.0
[/CIF]
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The crystal structure described by Ba3MnSb2O9 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to one O(4), two equivalent O(5), three equivalent O(1), three equivalent O(2), and three equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with three equivalent Ba(2)O12 cuboctahedra, corners with six equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Sb(1)O6 octahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with three equivalent Mn(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-12°. In the second Ba site, Ba(2) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and four equivalent O(5) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, corners with six equivalent Ba(2)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Mn(1)O6 octahedra, and faces with six equivalent Sb(1)O6 octahedra. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent Ba(2)O12 cuboctahedra, and faces with six equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 6-15°. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with three equivalent Ba(1)O12 cuboctahedra, corners with three equivalent Mn(1)O6 octahedra, faces with three equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-15°. There are five inequivalent O sites. In the first O site, O(3) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. In the second O site, O(4) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Sb(1) atoms to form distorted corner-sharing OBa4Sb2 octahedra. The corner-sharing octahedral tilt angles are 8°. In the third O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Sb(1) atoms. In the fourth O site, O(1) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. In the fifth O site, O(2) is bonded in a 2-coordinate geometry to one Ba(2), three equivalent Ba(1), one Mn(1), and one Sb(1) atom. is represented by the CIF file [CIF]
data_Ba3MnSb2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.989
_cell_length_b   5.989
_cell_length_c   14.829
_cell_angle_alpha   89.422
_cell_angle_beta   89.422
_cell_angle_gamma   119.929
_symmetry_Int_Tables_number   1
_cell_volume   460.932
_cell_formula_units_Z   2
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  0.339  0.674  0.412  1.0
  Ba  Ba1  1  0.326  0.661  0.088  1.0
  Ba  Ba2  1  0.661  0.326  0.588  1.0
  Ba  Ba3  1  0.674  0.339  0.912  1.0
  Ba  Ba4  1  0.997  0.003  0.250  1.0
  Ba  Ba5  1  0.003  0.997  0.750  1.0
  Mn  Mn6  1  0.000  0.000  0.000  1.0
  Mn  Mn7  1  0.000  0.000  0.500  1.0
  Sb  Sb8  1  0.678  0.346  0.347  1.0
  Sb  Sb9  1  0.654  0.322  0.153  1.0
  Sb  Sb10  1  0.346  0.678  0.847  1.0
  Sb  Sb11  1  0.322  0.654  0.653  1.0
  O  O12  1  0.854  0.683  0.405  1.0
  O  O13  1  0.317  0.146  0.095  1.0
  O  O14  1  0.146  0.317  0.595  1.0
  O  O15  1  0.683  0.854  0.905  1.0
  O  O16  1  0.368  0.197  0.425  1.0
  O  O17  1  0.803  0.632  0.075  1.0
  O  O18  1  0.632  0.803  0.575  1.0
  O  O19  1  0.197  0.368  0.925  1.0
  O  O20  1  0.856  0.197  0.414  1.0
  O  O21  1  0.803  0.144  0.086  1.0
  O  O22  1  0.144  0.803  0.586  1.0
  O  O23  1  0.197  0.856  0.914  1.0
  O  O24  1  0.482  0.518  0.750  1.0
  O  O25  1  0.518  0.482  0.250  1.0
  O  O26  1  0.040  0.519  0.758  1.0
  O  O27  1  0.481  0.960  0.742  1.0
  O  O28  1  0.960  0.481  0.242  1.0
  O  O29  1  0.519  0.040  0.258  1.0
[/CIF]
.