The structure described by Mg(BiO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(8), and two equivalent O(1) atoms to form distorted MgO4 tetrahedra that share  a cornercorner with one Bi(1)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Bi(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-42°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form BiO6 octahedra that share corners with two equivalent Bi(2)O5 square pyramids,  a cornercorner with one Mg(1)O4 tetrahedra, edges with two equivalent Bi(1)O6 octahedra, and edges with two equivalent Bi(4)O6 octahedra. In the second Bi site, Bi(2) is bonded to one O(4), two equivalent O(3), and two equivalent O(6) atoms to form BiO5 square pyramids that share corners with two equivalent Bi(1)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra, and edges with two equivalent Bi(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 47-50°. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(6), two equivalent O(2), and two equivalent O(8) atoms. In the fourth Bi site, Bi(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form distorted BiO6 octahedra that share corners with two equivalent Bi(2)O5 square pyramids, corners with two equivalent Mg(1)O4 tetrahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Bi(4)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Bi(4) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), and two equivalent Bi(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Bi(4) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Bi(4) and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(4) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Bi(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(BiO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.436
_cell_length_b   8.663
_cell_length_c   9.720
_cell_angle_alpha   89.115
_cell_angle_beta   80.125
_cell_angle_gamma   78.435
_symmetry_Int_Tables_number   1
_cell_volume   279.144
_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
  Mg  Mg0  1  0.341  0.616  0.698  1.0
  Bi  Bi1  1  0.644  0.224  0.495  1.0
  Bi  Bi2  1  0.143  0.511  0.208  1.0
  Bi  Bi3  1  0.884  0.358  0.877  1.0
  Bi  Bi4  1  0.350  0.849  0.471  1.0
  O  O5  1  0.822  0.715  0.634  1.0
  O  O6  1  0.480  0.382  0.665  1.0
  O  O7  1  0.521  0.654  0.313  1.0
  O  O8  1  0.148  0.331  0.378  1.0
  O  O9  1  0.156  0.106  0.592  1.0
  O  O10  1  0.771  0.362  0.101  1.0
  O  O11  1  0.813  0.997  0.382  1.0
  O  O12  1  0.288  0.528  0.896  1.0
[/CIF]
.
The structure described by Mg(BiO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(8), and two equivalent O(1) atoms to form distorted MgO4 tetrahedra that share  a cornercorner with one Bi(1)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra, corners with two equivalent Mg(1)O4 tetrahedra, and  an edgeedge with one Bi(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-42°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form BiO6 octahedra that share corners with two equivalent Bi(2)O5 square pyramids,  a cornercorner with one Mg(1)O4 tetrahedra, edges with two equivalent Bi(1)O6 octahedra, and edges with two equivalent Bi(4)O6 octahedra. In the second Bi site, Bi(2) is bonded to one O(4), two equivalent O(3), and two equivalent O(6) atoms to form BiO5 square pyramids that share corners with two equivalent Bi(1)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra, and edges with two equivalent Bi(2)O5 square pyramids. The corner-sharing octahedral tilt angles range from 47-50°. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(6), two equivalent O(2), and two equivalent O(8) atoms. In the fourth Bi site, Bi(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form distorted BiO6 octahedra that share corners with two equivalent Bi(2)O5 square pyramids, corners with two equivalent Mg(1)O4 tetrahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Bi(4)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent Bi(4) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), and two equivalent Bi(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Bi(4) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Bi(2) and two equivalent Bi(1) atoms. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Bi(4) and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(1) and two equivalent Bi(4) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Bi(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(BiO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.436
_cell_length_b   8.663
_cell_length_c   9.720
_cell_angle_alpha   89.115
_cell_angle_beta   80.125
_cell_angle_gamma   78.435
_symmetry_Int_Tables_number   1
_cell_volume   279.144
_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
  Mg  Mg0  1  0.341  0.616  0.698  1.0
  Bi  Bi1  1  0.644  0.224  0.495  1.0
  Bi  Bi2  1  0.143  0.511  0.208  1.0
  Bi  Bi3  1  0.884  0.358  0.877  1.0
  Bi  Bi4  1  0.350  0.849  0.471  1.0
  O  O5  1  0.822  0.715  0.634  1.0
  O  O6  1  0.480  0.382  0.665  1.0
  O  O7  1  0.521  0.654  0.313  1.0
  O  O8  1  0.148  0.331  0.378  1.0
  O  O9  1  0.156  0.106  0.592  1.0
  O  O10  1  0.771  0.362  0.101  1.0
  O  O11  1  0.813  0.997  0.382  1.0
  O  O12  1  0.288  0.528  0.896  1.0
[/CIF]
.