The material structure described by MgY4(BiO3)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(5), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(6), one O(8), and two equivalent O(2) atoms to form YO4 trigonal pyramids that share corners with two equivalent Y(4)O6 pentagonal pyramids and corners with two equivalent Y(3)O4 trigonal pyramids. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms. In the third Y site, Y(3) is bonded to one O(6), one O(8), and two equivalent O(4) atoms to form distorted corner-sharing YO4 trigonal pyramids. In the fourth Y site, Y(4) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form distorted corner-sharing YO6 pentagonal pyramids. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(8) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Y(2), and one Bi(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(1), one Y(4), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Y(4), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Y(2), one Y(3), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mg(1), one Y(2), one Y(4), and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Y(1), one Y(3), and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a tetrahedral geometry to one Y(2), one Y(4), and two equivalent Bi(2) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Y(1), one Y(3), and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y4Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.524
_cell_length_b   6.110
_cell_length_c   8.394
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.434
_symmetry_Int_Tables_number   1
_cell_volume   334.565
_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
  Y  Y0  1  0.992  0.988  0.750  1.0
  Y  Y1  1  0.403  0.529  0.250  1.0
  Y  Y2  1  0.527  0.499  0.750  1.0
  Y  Y3  1  0.046  0.035  0.250  1.0
  Mg  Mg4  1  0.830  0.551  0.250  1.0
  Bi  Bi5  1  0.036  0.463  0.565  1.0
  Bi  Bi6  1  0.553  0.012  0.485  1.0
  Bi  Bi7  1  0.553  0.012  0.015  1.0
  Bi  Bi8  1  0.036  0.463  0.935  1.0
  O  O9  1  0.644  0.343  0.406  1.0
  O  O10  1  0.139  0.116  0.528  1.0
  O  O11  1  0.820  0.830  0.096  1.0
  O  O12  1  0.344  0.617  0.962  1.0
  O  O13  1  0.344  0.617  0.538  1.0
  O  O14  1  0.820  0.830  0.404  1.0
  O  O15  1  0.139  0.116  0.972  1.0
  O  O16  1  0.644  0.343  0.094  1.0
  O  O17  1  0.099  0.401  0.250  1.0
  O  O18  1  0.720  0.194  0.750  1.0
  O  O19  1  0.377  0.909  0.250  1.0
  O  O20  1  0.788  0.705  0.750  1.0
[/CIF]
.
The material structure described by MgY4(BiO3)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(5), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(6), one O(8), and two equivalent O(2) atoms to form YO4 trigonal pyramids that share corners with two equivalent Y(4)O6 pentagonal pyramids and corners with two equivalent Y(3)O4 trigonal pyramids. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one O(5), one O(7), two equivalent O(1), and two equivalent O(4) atoms. In the third Y site, Y(3) is bonded to one O(6), one O(8), and two equivalent O(4) atoms to form distorted corner-sharing YO4 trigonal pyramids. In the fourth Y site, Y(4) is bonded to one O(5), one O(7), two equivalent O(2), and two equivalent O(3) atoms to form distorted corner-sharing YO6 pentagonal pyramids. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(8) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Y(2), and one Bi(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Y(1), one Y(4), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Y(4), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Y(2), one Y(3), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mg(1), one Y(2), one Y(4), and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Y(1), one Y(3), and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a tetrahedral geometry to one Y(2), one Y(4), and two equivalent Bi(2) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Y(1), one Y(3), and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y4Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.524
_cell_length_b   6.110
_cell_length_c   8.394
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.434
_symmetry_Int_Tables_number   1
_cell_volume   334.565
_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
  Y  Y0  1  0.992  0.988  0.750  1.0
  Y  Y1  1  0.403  0.529  0.250  1.0
  Y  Y2  1  0.527  0.499  0.750  1.0
  Y  Y3  1  0.046  0.035  0.250  1.0
  Mg  Mg4  1  0.830  0.551  0.250  1.0
  Bi  Bi5  1  0.036  0.463  0.565  1.0
  Bi  Bi6  1  0.553  0.012  0.485  1.0
  Bi  Bi7  1  0.553  0.012  0.015  1.0
  Bi  Bi8  1  0.036  0.463  0.935  1.0
  O  O9  1  0.644  0.343  0.406  1.0
  O  O10  1  0.139  0.116  0.528  1.0
  O  O11  1  0.820  0.830  0.096  1.0
  O  O12  1  0.344  0.617  0.962  1.0
  O  O13  1  0.344  0.617  0.538  1.0
  O  O14  1  0.820  0.830  0.404  1.0
  O  O15  1  0.139  0.116  0.972  1.0
  O  O16  1  0.644  0.343  0.094  1.0
  O  O17  1  0.099  0.401  0.250  1.0
  O  O18  1  0.720  0.194  0.750  1.0
  O  O19  1  0.377  0.909  0.250  1.0
  O  O20  1  0.788  0.705  0.750  1.0
[/CIF]
.