The material structure described by MgY4(BiO3)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a tetrahedral geometry to one O(5), one O(7), and two equivalent O(1) 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 corner-sharing YO4 tetrahedra. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(3), 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 in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom. 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 eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Y(2), one Y(4), and one Bi(1) 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 3-coordinate geometry to one Y(2), one Y(4), and one Bi(1) atom. In the fourth O site, O(4) is bonded to one Y(2), one Y(3), one Bi(1), and one Bi(2) atom to form distorted OY2Bi2 trigonal pyramids that share corners with two equivalent O(4)Y2Bi2 trigonal pyramids and  an edgeedge with one O(5)Y2MgBi2 trigonal bipyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Y(2), one Y(4), and two equivalent Bi(1) atoms to form distorted edge-sharing OY2MgBi2 trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like 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 3-coordinate geometry to one Mg(1), one Y(2), and one Y(4) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Y(1), one Y(3), and two equivalent Bi(1) atoms. is represented by the CIF card [CIF]
data_Y4Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.960
_cell_length_b   6.400
_cell_length_c   8.773
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   87.590
_symmetry_Int_Tables_number   1
_cell_volume   334.299
_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  0.965  0.996  0.750  1.0
  Y  Y1  1  0.552  0.636  0.250  1.0
  Y  Y2  1  0.530  0.518  0.750  1.0
  Y  Y3  1  0.971  0.033  0.250  1.0
  Mg  Mg4  1  0.470  0.206  0.250  1.0
  Bi  Bi5  1  0.000  0.489  0.480  1.0
  Bi  Bi6  1  0.459  0.970  0.561  1.0
  Bi  Bi7  1  0.459  0.970  0.939  1.0
  Bi  Bi8  1  0.000  0.489  0.020  1.0
  O  O9  1  0.702  0.315  0.395  1.0
  O  O10  1  0.116  0.112  0.538  1.0
  O  O11  1  0.819  0.783  0.100  1.0
  O  O12  1  0.375  0.630  0.970  1.0
  O  O13  1  0.375  0.630  0.530  1.0
  O  O14  1  0.819  0.783  0.400  1.0
  O  O15  1  0.116  0.112  0.962  1.0
  O  O16  1  0.702  0.315  0.105  1.0
  O  O17  1  0.187  0.397  0.250  1.0
  O  O18  1  0.669  0.202  0.750  1.0
  O  O19  1  0.335  0.933  0.250  1.0
  O  O20  1  0.837  0.680  0.750  1.0
[/CIF]
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The material structure described by MgY4(BiO3)4 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a tetrahedral geometry to one O(5), one O(7), and two equivalent O(1) 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 corner-sharing YO4 tetrahedra. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(3), 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 in a 8-coordinate geometry to one O(5), one O(7), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom. 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 eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Y(2), one Y(4), and one Bi(1) 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 3-coordinate geometry to one Y(2), one Y(4), and one Bi(1) atom. In the fourth O site, O(4) is bonded to one Y(2), one Y(3), one Bi(1), and one Bi(2) atom to form distorted OY2Bi2 trigonal pyramids that share corners with two equivalent O(4)Y2Bi2 trigonal pyramids and  an edgeedge with one O(5)Y2MgBi2 trigonal bipyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Y(2), one Y(4), and two equivalent Bi(1) atoms to form distorted edge-sharing OY2MgBi2 trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like 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 3-coordinate geometry to one Mg(1), one Y(2), and one Y(4) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Y(1), one Y(3), and two equivalent Bi(1) atoms. is represented by the CIF card [CIF]
data_Y4Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.960
_cell_length_b   6.400
_cell_length_c   8.773
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   87.590
_symmetry_Int_Tables_number   1
_cell_volume   334.299
_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  0.965  0.996  0.750  1.0
  Y  Y1  1  0.552  0.636  0.250  1.0
  Y  Y2  1  0.530  0.518  0.750  1.0
  Y  Y3  1  0.971  0.033  0.250  1.0
  Mg  Mg4  1  0.470  0.206  0.250  1.0
  Bi  Bi5  1  0.000  0.489  0.480  1.0
  Bi  Bi6  1  0.459  0.970  0.561  1.0
  Bi  Bi7  1  0.459  0.970  0.939  1.0
  Bi  Bi8  1  0.000  0.489  0.020  1.0
  O  O9  1  0.702  0.315  0.395  1.0
  O  O10  1  0.116  0.112  0.538  1.0
  O  O11  1  0.819  0.783  0.100  1.0
  O  O12  1  0.375  0.630  0.970  1.0
  O  O13  1  0.375  0.630  0.530  1.0
  O  O14  1  0.819  0.783  0.400  1.0
  O  O15  1  0.116  0.112  0.962  1.0
  O  O16  1  0.702  0.315  0.105  1.0
  O  O17  1  0.187  0.397  0.250  1.0
  O  O18  1  0.669  0.202  0.750  1.0
  O  O19  1  0.335  0.933  0.250  1.0
  O  O20  1  0.837  0.680  0.750  1.0
[/CIF]
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