The structure described by Ba2MgPrNbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), one O(6), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms. Mg(1) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(4), and one O(6) atom. Pr(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 distorted PrO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-15°. Nb(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 NbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-15°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Pr(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), one Pr(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Ba(2), one Pr(1), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), one Pr(1), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Pr(1), and one Nb(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Pr(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2PrMgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.993
_cell_length_b   6.209
_cell_length_c   6.064
_cell_angle_alpha   59.183
_cell_angle_beta   59.207
_cell_angle_gamma   63.565
_symmetry_Int_Tables_number   1
_cell_volume   188.145
_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  0.392  0.190  0.229  1.0
  Ba  Ba1  1  0.608  0.809  0.772  1.0
  Pr  Pr2  1  0.002  0.997  0.003  1.0
  Mg  Mg3  1  0.000  0.500  0.000  1.0
  Nb  Nb4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.739  0.743  0.212  1.0
  O  O6  1  0.261  0.694  0.787  1.0
  O  O7  1  0.700  0.285  0.731  1.0
  O  O8  1  0.261  0.257  0.786  1.0
  O  O9  1  0.298  0.716  0.268  1.0
  O  O10  1  0.739  0.307  0.211  1.0
[/CIF]
.
The structure described by Ba2MgPrNbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 3-coordinate geometry to one O(1), one O(3), one O(6), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. In the second Ba site, Ba(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), one O(5), two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms. Mg(1) is bonded in a distorted square co-planar geometry to one O(1), one O(2), one O(4), and one O(6) atom. Pr(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 distorted PrO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-15°. Nb(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 NbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-15°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Pr(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), one Pr(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Ba(2), one Pr(1), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), one Pr(1), and one Nb(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Pr(1), and one Nb(1) atom. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), one Pr(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2PrMgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.993
_cell_length_b   6.209
_cell_length_c   6.064
_cell_angle_alpha   59.183
_cell_angle_beta   59.207
_cell_angle_gamma   63.565
_symmetry_Int_Tables_number   1
_cell_volume   188.145
_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  0.392  0.190  0.229  1.0
  Ba  Ba1  1  0.608  0.809  0.772  1.0
  Pr  Pr2  1  0.002  0.997  0.003  1.0
  Mg  Mg3  1  0.000  0.500  0.000  1.0
  Nb  Nb4  1  0.500  0.500  0.500  1.0
  O  O5  1  0.739  0.743  0.212  1.0
  O  O6  1  0.261  0.694  0.787  1.0
  O  O7  1  0.700  0.285  0.731  1.0
  O  O8  1  0.261  0.257  0.786  1.0
  O  O9  1  0.298  0.716  0.268  1.0
  O  O10  1  0.739  0.307  0.211  1.0
[/CIF]
.