The material described by ZnB2Bi2O7 crystallizes in the orthorhombic Pba2 space group. Zn(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(5), one O(6), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one B(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(8) atom. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(7), 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(4), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Zn(1), one B(1), one Bi(1), and one Bi(2) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one B(2), one Bi(1), and one Bi(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent B(2) and two equivalent Bi(2) atoms. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent B(1) and two equivalent Bi(1) atoms. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Zn(1), one B(2), and one Bi(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Zn(1), one Bi(1), and one Bi(2) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to one B(1), one Bi(1), and one Bi(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(1), one B(1), and one Bi(2) atom. is represented by the CIF card [CIF]
data_ZnBi2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.901
_cell_length_b   10.822
_cell_length_c   10.971
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   581.950
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.070  0.742  0.241  1.0
  Zn  Zn1  1  0.070  0.242  0.259  1.0
  Zn  Zn2  1  0.070  0.258  0.759  1.0
  Zn  Zn3  1  0.070  0.758  0.741  1.0
  Bi  Bi4  1  0.582  0.321  0.031  1.0
  Bi  Bi5  1  0.578  0.514  0.314  1.0
  Bi  Bi6  1  0.578  0.486  0.686  1.0
  Bi  Bi7  1  0.582  0.679  0.969  1.0
  Bi  Bi8  1  0.578  0.986  0.814  1.0
  Bi  Bi9  1  0.582  0.179  0.531  1.0
  Bi  Bi10  1  0.582  0.821  0.469  1.0
  Bi  Bi11  1  0.578  0.014  0.186  1.0
  B  B12  1  0.125  0.514  0.872  1.0
  B  B13  1  0.080  0.384  0.480  1.0
  B  B14  1  0.125  0.986  0.372  1.0
  B  B15  1  0.080  0.884  0.020  1.0
  B  B16  1  0.125  0.014  0.628  1.0
  B  B17  1  0.080  0.116  0.980  1.0
  B  B18  1  0.080  0.616  0.520  1.0
  B  B19  1  0.125  0.486  0.128  1.0
  O  O20  1  0.956  0.500  0.500  1.0
  O  O21  1  0.215  0.500  0.000  1.0
  O  O22  1  0.930  0.198  0.916  1.0
  O  O23  1  0.930  0.698  0.584  1.0
  O  O24  1  0.738  0.200  0.174  1.0
  O  O25  1  0.956  0.000  0.000  1.0
  O  O26  1  0.828  0.479  0.141  1.0
  O  O27  1  0.249  0.088  0.298  1.0
  O  O28  1  0.828  0.521  0.859  1.0
  O  O29  1  0.215  0.000  0.500  1.0
  O  O30  1  0.738  0.300  0.674  1.0
  O  O31  1  0.930  0.802  0.084  1.0
  O  O32  1  0.930  0.302  0.416  1.0
  O  O33  1  0.268  0.871  0.326  1.0
  O  O34  1  0.268  0.129  0.674  1.0
  O  O35  1  0.337  0.635  0.478  1.0
  O  O36  1  0.337  0.865  0.978  1.0
  O  O37  1  0.337  0.135  0.022  1.0
  O  O38  1  0.249  0.588  0.202  1.0
  O  O39  1  0.249  0.912  0.702  1.0
  O  O40  1  0.828  0.979  0.359  1.0
  O  O41  1  0.337  0.365  0.522  1.0
  O  O42  1  0.738  0.700  0.326  1.0
  O  O43  1  0.249  0.412  0.798  1.0
  O  O44  1  0.828  0.021  0.641  1.0
  O  O45  1  0.738  0.800  0.826  1.0
  O  O46  1  0.268  0.371  0.174  1.0
  O  O47  1  0.268  0.629  0.826  1.0
[/CIF]
.
The material described by ZnB2Bi2O7 crystallizes in the orthorhombic Pba2 space group. Zn(1) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(5), one O(6), and one O(7) atom to form BO4 tetrahedra that share  a cornercorner with one B(1)O4 tetrahedra and corners with two equivalent Zn(1)O4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(8) atom. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(7), 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(4), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Zn(1), one B(1), one Bi(1), and one Bi(2) atom. In the second O site, O(8) is bonded in a distorted single-bond geometry to one B(2), one Bi(1), and one Bi(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent B(2) and two equivalent Bi(2) atoms. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent B(1) and two equivalent Bi(1) atoms. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Zn(1), one B(2), and one Bi(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Zn(1), one Bi(1), and one Bi(2) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to one B(1), one Bi(1), and one Bi(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(1), one B(1), and one Bi(2) atom. is represented by the CIF card [CIF]
data_ZnBi2B2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.901
_cell_length_b   10.822
_cell_length_c   10.971
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   581.950
_cell_formula_units_Z   4
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
  Zn  Zn0  1  0.070  0.742  0.241  1.0
  Zn  Zn1  1  0.070  0.242  0.259  1.0
  Zn  Zn2  1  0.070  0.258  0.759  1.0
  Zn  Zn3  1  0.070  0.758  0.741  1.0
  Bi  Bi4  1  0.582  0.321  0.031  1.0
  Bi  Bi5  1  0.578  0.514  0.314  1.0
  Bi  Bi6  1  0.578  0.486  0.686  1.0
  Bi  Bi7  1  0.582  0.679  0.969  1.0
  Bi  Bi8  1  0.578  0.986  0.814  1.0
  Bi  Bi9  1  0.582  0.179  0.531  1.0
  Bi  Bi10  1  0.582  0.821  0.469  1.0
  Bi  Bi11  1  0.578  0.014  0.186  1.0
  B  B12  1  0.125  0.514  0.872  1.0
  B  B13  1  0.080  0.384  0.480  1.0
  B  B14  1  0.125  0.986  0.372  1.0
  B  B15  1  0.080  0.884  0.020  1.0
  B  B16  1  0.125  0.014  0.628  1.0
  B  B17  1  0.080  0.116  0.980  1.0
  B  B18  1  0.080  0.616  0.520  1.0
  B  B19  1  0.125  0.486  0.128  1.0
  O  O20  1  0.956  0.500  0.500  1.0
  O  O21  1  0.215  0.500  0.000  1.0
  O  O22  1  0.930  0.198  0.916  1.0
  O  O23  1  0.930  0.698  0.584  1.0
  O  O24  1  0.738  0.200  0.174  1.0
  O  O25  1  0.956  0.000  0.000  1.0
  O  O26  1  0.828  0.479  0.141  1.0
  O  O27  1  0.249  0.088  0.298  1.0
  O  O28  1  0.828  0.521  0.859  1.0
  O  O29  1  0.215  0.000  0.500  1.0
  O  O30  1  0.738  0.300  0.674  1.0
  O  O31  1  0.930  0.802  0.084  1.0
  O  O32  1  0.930  0.302  0.416  1.0
  O  O33  1  0.268  0.871  0.326  1.0
  O  O34  1  0.268  0.129  0.674  1.0
  O  O35  1  0.337  0.635  0.478  1.0
  O  O36  1  0.337  0.865  0.978  1.0
  O  O37  1  0.337  0.135  0.022  1.0
  O  O38  1  0.249  0.588  0.202  1.0
  O  O39  1  0.249  0.912  0.702  1.0
  O  O40  1  0.828  0.979  0.359  1.0
  O  O41  1  0.337  0.365  0.522  1.0
  O  O42  1  0.738  0.700  0.326  1.0
  O  O43  1  0.249  0.412  0.798  1.0
  O  O44  1  0.828  0.021  0.641  1.0
  O  O45  1  0.738  0.800  0.826  1.0
  O  O46  1  0.268  0.371  0.174  1.0
  O  O47  1  0.268  0.629  0.826  1.0
[/CIF]
.