The compound described by Ba2MgLaBiO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. Mg(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form MgO5 square pyramids that share corners with two equivalent La(1)O6 octahedra and  a faceface with one La(1)O6 octahedra. The corner-sharing octahedral tilt angles are 36°. La(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted LaO6 octahedra that share corners with two equivalent Mg(1)O5 square pyramids and  a faceface with one Mg(1)O5 square pyramid. Bi(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four 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 La(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one La(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(2), two equivalent Ba(1), one La(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), and one La(1) atom. is represented by the CIF file [CIF]
data_Ba2LaMgBiO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.838
_cell_length_b   6.838
_cell_length_c   6.339
_cell_angle_alpha   91.003
_cell_angle_beta   115.344
_cell_angle_gamma   125.942
_symmetry_Int_Tables_number   1
_cell_volume   201.689
_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  0.099  0.648  0.747  1.0
  Ba  Ba1  1  0.987  0.223  0.210  1.0
  La  La2  1  0.436  0.030  0.466  1.0
  Mg  Mg3  1  0.700  0.789  0.489  1.0
  Bi  Bi4  1  0.502  0.469  0.971  1.0
  O  O5  1  0.973  0.192  0.681  1.0
  O  O6  1  0.511  0.381  0.346  1.0
  O  O7  1  0.965  0.835  0.346  1.0
  O  O8  1  0.489  0.708  0.681  1.0
  O  O9  1  0.619  0.258  0.877  1.0
  O  O10  1  0.418  0.778  0.196  1.0
[/CIF]
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The compound described by Ba2MgLaBiO6 crystallizes in the monoclinic Cm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. Mg(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(2) atoms to form MgO5 square pyramids that share corners with two equivalent La(1)O6 octahedra and  a faceface with one La(1)O6 octahedra. The corner-sharing octahedral tilt angles are 36°. La(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form distorted LaO6 octahedra that share corners with two equivalent Mg(1)O5 square pyramids and  a faceface with one Mg(1)O5 square pyramid. Bi(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. There are four 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 La(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), one La(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(2), two equivalent Ba(1), one La(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), two equivalent Ba(2), one Mg(1), and one La(1) atom. is represented by the CIF file [CIF]
data_Ba2LaMgBiO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.838
_cell_length_b   6.838
_cell_length_c   6.339
_cell_angle_alpha   91.003
_cell_angle_beta   115.344
_cell_angle_gamma   125.942
_symmetry_Int_Tables_number   1
_cell_volume   201.689
_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  0.099  0.648  0.747  1.0
  Ba  Ba1  1  0.987  0.223  0.210  1.0
  La  La2  1  0.436  0.030  0.466  1.0
  Mg  Mg3  1  0.700  0.789  0.489  1.0
  Bi  Bi4  1  0.502  0.469  0.971  1.0
  O  O5  1  0.973  0.192  0.681  1.0
  O  O6  1  0.511  0.381  0.346  1.0
  O  O7  1  0.965  0.835  0.346  1.0
  O  O8  1  0.489  0.708  0.681  1.0
  O  O9  1  0.619  0.258  0.877  1.0
  O  O10  1  0.418  0.778  0.196  1.0
[/CIF]
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