The structure described by Ba3MgNb2ZnO9 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(4), and three equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share faces with two equivalent Nb(1)O6 octahedra. Nb(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form NbO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedra are not tilted. Zn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one Nb(1), and one Zn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Ba(1), one Mg(1), and one Nb(1) atom. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Nb(1) atoms to form distorted corner-sharing OBa4Nb2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Nb(1) atoms. is represented by the CIF card [CIF]
data_Ba3MgNb2ZnO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.721
_cell_length_b   6.206
_cell_length_c   7.886
_cell_angle_alpha   103.744
_cell_angle_beta   90.000
_cell_angle_gamma   117.446
_symmetry_Int_Tables_number   1
_cell_volume   239.382
_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  0.713  0.426  0.300  1.0
  Ba  Ba1  1  0.287  0.574  0.700  1.0
  Ba  Ba2  1  0.000  0.000  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.500  1.0
  Nb  Nb4  1  0.365  0.731  0.152  1.0
  Nb  Nb5  1  0.635  0.269  0.848  1.0
  Zn  Zn6  1  0.000  0.000  0.500  1.0
  O  O7  1  0.755  0.013  0.689  1.0
  O  O8  1  0.710  0.420  0.643  1.0
  O  O9  1  0.258  0.013  0.689  1.0
  O  O10  1  0.742  0.987  0.311  1.0
  O  O11  1  0.290  0.580  0.357  1.0
  O  O12  1  0.245  0.987  0.311  1.0
  O  O13  1  0.500  0.000  0.000  1.0
  O  O14  1  0.000  0.500  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
[/CIF]
.
The structure described by Ba3MgNb2ZnO9 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(4), and three equivalent O(2) atoms. In the second Ba site, Ba(2) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share faces with two equivalent Nb(1)O6 octahedra. Nb(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form NbO6 octahedra that share corners with three equivalent Nb(1)O6 octahedra and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedra are not tilted. Zn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one Nb(1), and one Zn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Ba(1), one Mg(1), and one Nb(1) atom. In the third O site, O(3) is bonded to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Nb(1) atoms to form distorted corner-sharing OBa4Nb2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(2), and two equivalent Nb(1) atoms. is represented by the CIF card [CIF]
data_Ba3MgNb2ZnO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.721
_cell_length_b   6.206
_cell_length_c   7.886
_cell_angle_alpha   103.744
_cell_angle_beta   90.000
_cell_angle_gamma   117.446
_symmetry_Int_Tables_number   1
_cell_volume   239.382
_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  0.713  0.426  0.300  1.0
  Ba  Ba1  1  0.287  0.574  0.700  1.0
  Ba  Ba2  1  0.000  0.000  0.000  1.0
  Mg  Mg3  1  0.500  0.000  0.500  1.0
  Nb  Nb4  1  0.365  0.731  0.152  1.0
  Nb  Nb5  1  0.635  0.269  0.848  1.0
  Zn  Zn6  1  0.000  0.000  0.500  1.0
  O  O7  1  0.755  0.013  0.689  1.0
  O  O8  1  0.710  0.420  0.643  1.0
  O  O9  1  0.258  0.013  0.689  1.0
  O  O10  1  0.742  0.987  0.311  1.0
  O  O11  1  0.290  0.580  0.357  1.0
  O  O12  1  0.245  0.987  0.311  1.0
  O  O13  1  0.500  0.000  0.000  1.0
  O  O14  1  0.000  0.500  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
[/CIF]
.