The material described by MgZn2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(3), one O(7), and one O(8) atom to form MgO4 tetrahedra that share  a cornercorner with one Bi(2)O6 octahedra,  a cornercorner with one Bi(4)O6 octahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  a cornercorner with one Zn(2)O5 trigonal bipyramid, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-48°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(11), one O(4), one O(8), and one O(9) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Bi(2)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. In the second Zn site, Zn(2) is bonded to one O(10), one O(12), one O(2), one O(5), and one O(6) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Bi(2)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and edges with two equivalent Bi(4)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(11), one O(3), one O(4), one O(5), and one O(7) atom. In the second Bi site, Bi(2) is bonded to one O(12), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form BiO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  a cornercorner with one Zn(2)O5 trigonal bipyramid,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(6), and one O(9) atom. In the fourth Bi site, Bi(4) is bonded to one O(1), one O(10), one O(11), one O(2), one O(5), and one O(6) atom to form distorted BiO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent Zn(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Bi(3), and one Bi(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Bi(3), and one Bi(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Zn(2), one Bi(1), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Zn(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(1), and one Bi(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Zn(1), one Bi(2), and one Bi(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Zn(2), one Bi(3), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Zn(1), one Bi(1), and one Bi(4) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Zn(2), one Bi(2), and one Bi(3) atom. is represented by the CIF file [CIF]
data_MgZn2(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.144
_cell_length_b   6.170
_cell_length_c   7.801
_cell_angle_alpha   92.031
_cell_angle_beta   89.688
_cell_angle_gamma   81.114
_symmetry_Int_Tables_number   1
_cell_volume   291.937
_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  0.828  0.124  0.932  1.0
  Zn  Zn1  1  0.443  0.520  0.234  1.0
  Zn  Zn2  1  0.062  0.876  0.621  1.0
  Bi  Bi3  1  0.406  0.941  0.998  1.0
  Bi  Bi4  1  0.978  0.538  0.023  1.0
  Bi  Bi5  1  0.920  0.415  0.507  1.0
  Bi  Bi6  1  0.537  0.006  0.507  1.0
  O  O7  1  0.610  0.328  0.407  1.0
  O  O8  1  0.181  0.153  0.544  1.0
  O  O9  1  0.786  0.852  0.033  1.0
  O  O10  1  0.294  0.635  0.010  1.0
  O  O11  1  0.391  0.833  0.700  1.0
  O  O12  1  0.839  0.771  0.449  1.0
  O  O13  1  0.120  0.203  0.951  1.0
  O  O14  1  0.693  0.393  0.059  1.0
  O  O15  1  0.117  0.455  0.277  1.0
  O  O16  1  0.781  0.124  0.682  1.0
  O  O17  1  0.414  0.852  0.288  1.0
  O  O18  1  0.972  0.595  0.740  1.0
[/CIF]
.
The material described by MgZn2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(3), one O(7), and one O(8) atom to form MgO4 tetrahedra that share  a cornercorner with one Bi(2)O6 octahedra,  a cornercorner with one Bi(4)O6 octahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  a cornercorner with one Zn(2)O5 trigonal bipyramid, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-48°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(11), one O(4), one O(8), and one O(9) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Bi(2)O6 octahedra, corners with two equivalent Bi(4)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and  an edgeedge with one Bi(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. In the second Zn site, Zn(2) is bonded to one O(10), one O(12), one O(2), one O(5), and one O(6) atom to form distorted ZnO5 trigonal bipyramids that share  a cornercorner with one Bi(2)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and edges with two equivalent Bi(4)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(11), one O(3), one O(4), one O(5), and one O(7) atom. In the second Bi site, Bi(2) is bonded to one O(12), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form BiO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Zn(1)O5 trigonal bipyramid,  a cornercorner with one Zn(2)O5 trigonal bipyramid,  an edgeedge with one Mg(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(6), and one O(9) atom. In the fourth Bi site, Bi(4) is bonded to one O(1), one O(10), one O(11), one O(2), one O(5), and one O(6) atom to form distorted BiO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra, corners with two equivalent Zn(1)O5 trigonal bipyramids, and edges with two equivalent Zn(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Zn(1), one Bi(3), and one Bi(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Bi(3), and one Bi(4) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Zn(2), one Bi(1), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Zn(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(1), and one Bi(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Zn(1), one Bi(2), and one Bi(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Zn(2), one Bi(3), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Zn(1), one Bi(1), and one Bi(4) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Zn(2), one Bi(2), and one Bi(3) atom. is represented by the CIF file [CIF]
data_MgZn2(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.144
_cell_length_b   6.170
_cell_length_c   7.801
_cell_angle_alpha   92.031
_cell_angle_beta   89.688
_cell_angle_gamma   81.114
_symmetry_Int_Tables_number   1
_cell_volume   291.937
_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  0.828  0.124  0.932  1.0
  Zn  Zn1  1  0.443  0.520  0.234  1.0
  Zn  Zn2  1  0.062  0.876  0.621  1.0
  Bi  Bi3  1  0.406  0.941  0.998  1.0
  Bi  Bi4  1  0.978  0.538  0.023  1.0
  Bi  Bi5  1  0.920  0.415  0.507  1.0
  Bi  Bi6  1  0.537  0.006  0.507  1.0
  O  O7  1  0.610  0.328  0.407  1.0
  O  O8  1  0.181  0.153  0.544  1.0
  O  O9  1  0.786  0.852  0.033  1.0
  O  O10  1  0.294  0.635  0.010  1.0
  O  O11  1  0.391  0.833  0.700  1.0
  O  O12  1  0.839  0.771  0.449  1.0
  O  O13  1  0.120  0.203  0.951  1.0
  O  O14  1  0.693  0.393  0.059  1.0
  O  O15  1  0.117  0.455  0.277  1.0
  O  O16  1  0.781  0.124  0.682  1.0
  O  O17  1  0.414  0.852  0.288  1.0
  O  O18  1  0.972  0.595  0.740  1.0
[/CIF]
.