The structure described by Zn2V2O7 crystallizes in the monoclinic C2/c space group. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with five equivalent Zn(1)O5 trigonal bipyramids. Zn(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZnO5 trigonal bipyramids that share corners with five equivalent V(1)O4 tetrahedra and edges with two equivalent Zn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one Zn(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Zn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Zn(1) atoms. is represented by the CIF card [CIF]
data_V2Zn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.580
_cell_length_b   5.580
_cell_length_c   10.125
_cell_angle_alpha   75.731
_cell_angle_beta   75.731
_cell_angle_gamma   95.807
_symmetry_Int_Tables_number   1
_cell_volume   291.649
_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
  V  V0  1  0.489  0.999  0.706  1.0
  V  V1  1  0.001  0.511  0.794  1.0
  V  V2  1  0.511  0.001  0.294  1.0
  V  V3  1  0.999  0.489  0.206  1.0
  Zn  Zn4  1  0.603  0.752  0.021  1.0
  Zn  Zn5  1  0.248  0.397  0.479  1.0
  Zn  Zn6  1  0.397  0.248  0.979  1.0
  Zn  Zn7  1  0.752  0.603  0.521  1.0
  O  O8  1  0.701  0.868  0.613  1.0
  O  O9  1  0.132  0.299  0.887  1.0
  O  O10  1  0.299  0.132  0.387  1.0
  O  O11  1  0.868  0.701  0.113  1.0
  O  O12  1  0.484  0.295  0.605  1.0
  O  O13  1  0.705  0.516  0.895  1.0
  O  O14  1  0.516  0.705  0.395  1.0
  O  O15  1  0.295  0.484  0.105  1.0
  O  O16  1  0.813  0.187  0.250  1.0
  O  O17  1  0.187  0.813  0.750  1.0
  O  O18  1  0.015  0.555  0.362  1.0
  O  O19  1  0.445  0.985  0.138  1.0
  O  O20  1  0.985  0.445  0.638  1.0
  O  O21  1  0.555  0.015  0.862  1.0
[/CIF]
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The structure described by Zn2V2O7 crystallizes in the monoclinic C2/c space group. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with five equivalent Zn(1)O5 trigonal bipyramids. Zn(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZnO5 trigonal bipyramids that share corners with five equivalent V(1)O4 tetrahedra and edges with two equivalent Zn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one Zn(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Zn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Zn(1) atoms. is represented by the CIF card [CIF]
data_V2Zn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.580
_cell_length_b   5.580
_cell_length_c   10.125
_cell_angle_alpha   75.731
_cell_angle_beta   75.731
_cell_angle_gamma   95.807
_symmetry_Int_Tables_number   1
_cell_volume   291.649
_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
  V  V0  1  0.489  0.999  0.706  1.0
  V  V1  1  0.001  0.511  0.794  1.0
  V  V2  1  0.511  0.001  0.294  1.0
  V  V3  1  0.999  0.489  0.206  1.0
  Zn  Zn4  1  0.603  0.752  0.021  1.0
  Zn  Zn5  1  0.248  0.397  0.479  1.0
  Zn  Zn6  1  0.397  0.248  0.979  1.0
  Zn  Zn7  1  0.752  0.603  0.521  1.0
  O  O8  1  0.701  0.868  0.613  1.0
  O  O9  1  0.132  0.299  0.887  1.0
  O  O10  1  0.299  0.132  0.387  1.0
  O  O11  1  0.868  0.701  0.113  1.0
  O  O12  1  0.484  0.295  0.605  1.0
  O  O13  1  0.705  0.516  0.895  1.0
  O  O14  1  0.516  0.705  0.395  1.0
  O  O15  1  0.295  0.484  0.105  1.0
  O  O16  1  0.813  0.187  0.250  1.0
  O  O17  1  0.187  0.813  0.750  1.0
  O  O18  1  0.015  0.555  0.362  1.0
  O  O19  1  0.445  0.985  0.138  1.0
  O  O20  1  0.985  0.445  0.638  1.0
  O  O21  1  0.555  0.015  0.862  1.0
[/CIF]
.