The material structure described by Na4Mg(BiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted NaO5 square pyramids that share corners with four equivalent Mg(1)O4 tetrahedra and edges with two equivalent Bi(1)O5 square pyramids. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(5), and one O(6) atom. Mg(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form MgO4 tetrahedra that share corners with three equivalent Bi(1)O5 square pyramids and corners with four equivalent Na(1)O5 square pyramids. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form distorted BiO5 square pyramids that share corners with three equivalent Mg(1)O4 tetrahedra and edges with two equivalent Na(1)O5 square pyramids. In the second Bi site, Bi(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Mg(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal bipyramidal geometry to one Na(2), one Na(3), one Na(4), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.323
_cell_length_b   6.078
_cell_length_c   6.614
_cell_angle_alpha   78.554
_cell_angle_beta   109.519
_cell_angle_gamma   65.626
_symmetry_Int_Tables_number   1
_cell_volume   200.764
_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
  Na  Na0  1  0.546  0.644  0.517  1.0
  Na  Na1  1  0.285  0.239  0.412  1.0
  Na  Na2  1  0.803  0.678  0.972  1.0
  Na  Na3  1  0.427  0.505  0.029  1.0
  Mg  Mg4  1  0.355  0.140  0.865  1.0
  Bi  Bi5  1  0.939  0.883  0.491  1.0
  Bi  Bi6  1  0.989  0.084  0.999  1.0
  O  O7  1  0.324  0.876  0.729  1.0
  O  O8  1  0.119  0.711  0.277  1.0
  O  O9  1  0.034  0.503  0.749  1.0
  O  O10  1  0.609  0.173  0.767  1.0
  O  O11  1  0.502  0.010  0.215  1.0
  O  O12  1  0.873  0.290  0.198  1.0
[/CIF]
.
The material structure described by Na4Mg(BiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted NaO5 square pyramids that share corners with four equivalent Mg(1)O4 tetrahedra and edges with two equivalent Bi(1)O5 square pyramids. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(5), and one O(6) atom. Mg(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form MgO4 tetrahedra that share corners with three equivalent Bi(1)O5 square pyramids and corners with four equivalent Na(1)O5 square pyramids. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form distorted BiO5 square pyramids that share corners with three equivalent Mg(1)O4 tetrahedra and edges with two equivalent Na(1)O5 square pyramids. In the second Bi site, Bi(2) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Na(1), one Na(2), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(4), one Mg(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Mg(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(4), one Mg(1), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal bipyramidal geometry to one Na(2), one Na(3), one Na(4), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na4Mg(BiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.323
_cell_length_b   6.078
_cell_length_c   6.614
_cell_angle_alpha   78.554
_cell_angle_beta   109.519
_cell_angle_gamma   65.626
_symmetry_Int_Tables_number   1
_cell_volume   200.764
_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
  Na  Na0  1  0.546  0.644  0.517  1.0
  Na  Na1  1  0.285  0.239  0.412  1.0
  Na  Na2  1  0.803  0.678  0.972  1.0
  Na  Na3  1  0.427  0.505  0.029  1.0
  Mg  Mg4  1  0.355  0.140  0.865  1.0
  Bi  Bi5  1  0.939  0.883  0.491  1.0
  Bi  Bi6  1  0.989  0.084  0.999  1.0
  O  O7  1  0.324  0.876  0.729  1.0
  O  O8  1  0.119  0.711  0.277  1.0
  O  O9  1  0.034  0.503  0.749  1.0
  O  O10  1  0.609  0.173  0.767  1.0
  O  O11  1  0.502  0.010  0.215  1.0
  O  O12  1  0.873  0.290  0.198  1.0
[/CIF]
.