The structure described by Ba2MgLaNbO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Mg(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted MgO5 square pyramids that share corners with two equivalent Nb(1)O5 trigonal bipyramids and  an edgeedge with one Nb(1)O5 trigonal bipyramid. La(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(4) atoms. Nb(1) is bonded to one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted NbO5 trigonal bipyramids that share corners with two equivalent Mg(1)O5 square pyramids and  an edgeedge with one Mg(1)O5 square pyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), and one La(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Ba(2), one La(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one La(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2LaMgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.953
_cell_length_b   5.953
_cell_length_c   7.005
_cell_angle_alpha   90.261
_cell_angle_beta   114.509
_cell_angle_gamma   120.432
_symmetry_Int_Tables_number   1
_cell_volume   187.312
_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  0.965  0.795  0.760  1.0
  Ba  Ba1  1  0.092  0.364  0.456  1.0
  La  La2  1  0.368  0.984  0.352  1.0
  Mg  Mg3  1  0.726  0.189  0.914  1.0
  Nb  Nb4  1  0.514  0.537  0.051  1.0
  O  O5  1  0.439  0.214  0.652  1.0
  O  O6  1  0.584  0.730  0.313  1.0
  O  O7  1  0.065  0.311  0.836  1.0
  O  O8  1  0.499  0.180  0.102  1.0
  O  O9  1  0.922  0.603  0.102  1.0
  O  O10  1  0.525  0.770  0.836  1.0
[/CIF]
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The structure described by Ba2MgLaNbO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Mg(1) is bonded to one O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted MgO5 square pyramids that share corners with two equivalent Nb(1)O5 trigonal bipyramids and  an edgeedge with one Nb(1)O5 trigonal bipyramid. La(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(4) atoms. Nb(1) is bonded to one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted NbO5 trigonal bipyramids that share corners with two equivalent Mg(1)O5 square pyramids and  an edgeedge with one Mg(1)O5 square pyramid. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), and one La(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), two equivalent Ba(2), one La(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ba(2), two equivalent Ba(1), one Mg(1), and one Nb(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one La(1), and one Nb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2LaMgNbO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.953
_cell_length_b   5.953
_cell_length_c   7.005
_cell_angle_alpha   90.261
_cell_angle_beta   114.509
_cell_angle_gamma   120.432
_symmetry_Int_Tables_number   1
_cell_volume   187.312
_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  0.965  0.795  0.760  1.0
  Ba  Ba1  1  0.092  0.364  0.456  1.0
  La  La2  1  0.368  0.984  0.352  1.0
  Mg  Mg3  1  0.726  0.189  0.914  1.0
  Nb  Nb4  1  0.514  0.537  0.051  1.0
  O  O5  1  0.439  0.214  0.652  1.0
  O  O6  1  0.584  0.730  0.313  1.0
  O  O7  1  0.065  0.311  0.836  1.0
  O  O8  1  0.499  0.180  0.102  1.0
  O  O9  1  0.922  0.603  0.102  1.0
  O  O10  1  0.525  0.770  0.836  1.0
[/CIF]
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