data_Zn2Bi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.53
_cell_length_b   7.06
_cell_length_c   12.47
_cell_angle_alpha   92.18
_cell_angle_beta   92.34
_cell_angle_gamma   90.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zn2Bi2O5
_chemical_formula_sum   'Zn4 Bi4 O10'
_cell_volume   310.44
_cell_formula_units_Z   2
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  0.7  0.6  0.17  1.0
  Zn  Zn1  1  0.24  0.93  0.0  1.0
  Zn  Zn2  1  0.48  0.01  0.81  1.0
  Zn  Zn3  1  0.5  0.55  0.5  1.0
  Bi  Bi4  1  0.28  0.07  0.69  1.0
  Bi  Bi5  1  0.68  0.83  0.85  1.0
  Bi  Bi6  1  0.01  0.4  0.08  1.0
  Bi  Bi7  1  0.94  0.39  0.69  1.0
  O  O8  1  0.72  0.15  0.43  1.0
  O  O9  1  0.73  0.2  0.28  1.0
  O  O10  1  0.0  0.52  0.35  1.0
  O  O11  1  0.93  1.0  0.03  1.0
  O  O12  1  0.23  0.77  0.49  1.0
  O  O13  1  0.73  0.69  0.53  1.0
  O  O14  1  0.24  0.94  0.03  1.0
  O  O15  1  0.51  0.98  0.47  1.0
  O  O16  1  0.04  0.33  0.62  1.0
  O  O17  1  0.47  0.59  0.79  1.0

data_Zn2Bi2O5
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.53
_cell_length_b   7.06
_cell_length_c   12.47
_cell_angle_alpha   92.18
_cell_angle_beta   92.34
_cell_angle_gamma   90.47
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zn2Bi2O5
_chemical_formula_sum   'Zn4 Bi4 O10'
_cell_volume   310.44
_cell_formula_units_Z   2
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  0.24  0.93  0.0  1.0
  Zn  Zn1  1  0.48  0.01  0.81  1.0
  Zn  Zn2  1  0.5  0.55  0.5  1.0
  Zn  Zn3  1  0.7  0.6  0.17  1.0
  Bi  Bi4  1  0.01  0.4  0.08  1.0
  Bi  Bi5  1  0.28  0.07  0.69  1.0
  Bi  Bi6  1  0.68  0.83  0.85  1.0
  Bi  Bi7  1  0.94  0.39  0.69  1.0
  O  O8  1  0.0  0.52  0.35  1.0
  O  O9  1  0.04  0.33  0.62  1.0
  O  O10  1  0.23  0.77  0.49  1.0
  O  O11  1  0.24  0.94  0.03  1.0
  O  O12  1  0.47  0.59  0.79  1.0
  O  O13  1  0.51  0.98  0.47  1.0
  O  O14  1  0.72  0.15  0.43  1.0
  O  O15  1  0.73  0.69  0.53  1.0
  O  O16  1  0.73  0.2  0.28  1.0
  O  O17  1  0.93  1.0  0.03  1.0

Zn Zn Zn Zn Bi Bi Bi Bi O O O O O O O O O O
Zn Zn Zn Zn Bi Bi Bi Bi O O O O O O O O O O 0 6 + o o 0 10 + o o 1 14 o o o 1 11 - o o 2 4 o o o 2 5 o - o 3 13 o o o 3 10 + o o 3 10 o o o 3 12 o o o 5 17 o o o 7 16 + o o 8 15 o - o 8 9 o o o 8 10 + o o 9 10 + o o 10 13 - o o 10 12 o o o 11 14 + o o 12 13 - o o 12 13 o o o 12 15 o o o 
Zn2Bi2O5 crystallizes in the triclinic P1 space group. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 3-coordinate geometry to two equivalent Bi(3) and one O(3) atom. There is one shorter (2.13 Å) and one longer (2.95 Å) Zn(1)-Bi(3) bond length. The Zn(1)-O(3) bond length is 2.61 Å. In the second Zn site, Zn(2) is bonded in a single-bond geometry to one O(7) and two equivalent O(4) atoms. The Zn(2)-O(7) bond length is 0.38 Å. There is one shorter (1.27 Å) and one longer (2.49 Å) Zn(2)-O(4) bond length. In the third Zn site, Zn(3) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one Bi(2) atom. The Zn(3)-Bi(1) bond length is 1.70 Å. The Zn(3)-Bi(2) bond length is 1.60 Å. In the fourth Zn site, Zn(4) is bonded in a 1-coordinate geometry to one O(5), one O(6), and two equivalent O(3) atoms. The Zn(4)-O(5) bond length is 1.77 Å. The Zn(4)-O(6) bond length is 1.31 Å. There is one shorter (2.45 Å) and one longer (2.59 Å) Zn(4)-O(3) bond length. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted bent 150 degrees geometry to one Zn(3), one O(8), and one O(9) atom. The Bi(1)-O(8) bond length is 2.91 Å. The Bi(1)-O(9) bond length is 2.24 Å. In the second Bi site, Bi(2) is bonded in a distorted bent 120 degrees geometry to one Zn(3), one O(10), and one O(4) atom. The Bi(2)-O(10) bond length is 1.98 Å. The Bi(2)-O(4) bond length is 2.60 Å. In the third Bi site, Bi(3) is bonded in a distorted single-bond geometry to two equivalent Zn(1) and one O(4) atom. The Bi(3)-O(4) bond length is 2.90 Å. In the fourth Bi site, Bi(4) is bonded in a single-bond geometry to one O(9) and two equivalent O(10) atoms. The Bi(4)-O(9) bond length is 1.06 Å. There is one shorter (2.49 Å) and one longer (2.55 Å) Bi(4)-O(10) bond length. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one O(2) and one O(8) atom. The O(1)-O(2) bond length is 1.91 Å. The O(1)-O(8) bond length is 1.58 Å. In the second O site, O(2) is bonded in a single-bond geometry to one O(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Zn(4) atoms. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Zn(2), one Bi(2), one Bi(3), and one O(7) atom. The O(4)-O(7) bond length is 1.15 Å. In the fifth O site, O(5) is bonded in a single-bond geometry to one Zn(4) and one O(8) atom. The O(5)-O(8) bond length is 1.81 Å. In the sixth O site, O(6) is bonded in a single-bond geometry to one Zn(4) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Zn(2) and one O(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Bi(1), one O(1), and one O(5) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Bi(1) and one Bi(4) atom. In the tenth O site, O(10) is bonded in a distorted T-shaped geometry to one Bi(2) and two equivalent Bi(4) atoms.