The structure described by V2NiP2(H4O7)2 crystallizes in the tetragonal I4/m space group. V(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Ni(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. Ni(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form NiO6 octahedra that share corners with two equivalent V(1)O5 trigonal bipyramids. P(1) is bonded to four equivalent O(1) atoms to form PO4 tetrahedra that share corners with four equivalent V(1)O5 trigonal bipyramids. H(1) is bonded in a single-bond geometry to one O(3) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to one V(1) and one Ni(1) atom. In the second O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ni(1) and two equivalent H(1) atoms. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2NiP2(H4O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.334
_cell_length_b   6.334
_cell_length_c   8.063
_cell_angle_alpha   113.126
_cell_angle_beta   113.125
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   269.005
_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
  V  V0  1  0.277  0.277  0.555  1.0
  V  V1  1  0.723  0.723  0.445  1.0
  Ni  Ni2  1  0.000  0.000  0.000  1.0
  P  P3  1  0.250  0.750  0.500  1.0
  P  P4  1  0.750  0.250  0.500  1.0
  H  H5  1  0.406  0.241  0.120  1.0
  H  H6  1  0.878  0.406  0.120  1.0
  H  H7  1  0.241  0.713  0.120  1.0
  H  H8  1  0.713  0.878  0.120  1.0
  H  H9  1  0.594  0.759  0.880  1.0
  H  H10  1  0.287  0.122  0.880  1.0
  H  H11  1  0.122  0.594  0.880  1.0
  H  H12  1  0.759  0.287  0.880  1.0
  O  O13  1  0.014  0.346  0.637  1.0
  O  O14  1  0.377  0.709  0.363  1.0
  O  O15  1  0.291  0.014  0.637  1.0
  O  O16  1  0.709  0.986  0.363  1.0
  O  O17  1  0.986  0.654  0.363  1.0
  O  O18  1  0.346  0.623  0.637  1.0
  O  O19  1  0.845  0.845  0.690  1.0
  O  O20  1  0.257  0.200  0.000  1.0
  O  O21  1  0.800  0.257  0.000  1.0
  O  O22  1  0.200  0.743  0.000  1.0
  O  O23  1  0.743  0.800  0.000  1.0
  O  O24  1  0.623  0.291  0.637  1.0
  O  O25  1  0.654  0.377  0.363  1.0
  O  O26  1  0.155  0.155  0.310  1.0
[/CIF]
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The structure described by V2NiP2(H4O7)2 crystallizes in the tetragonal I4/m space group. V(1) is bonded to one O(2) and four equivalent O(1) atoms to form distorted VO5 trigonal bipyramids that share  a cornercorner with one Ni(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. Ni(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form NiO6 octahedra that share corners with two equivalent V(1)O5 trigonal bipyramids. P(1) is bonded to four equivalent O(1) atoms to form PO4 tetrahedra that share corners with four equivalent V(1)O5 trigonal bipyramids. H(1) is bonded in a single-bond geometry to one O(3) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a linear geometry to one V(1) and one Ni(1) atom. In the second O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ni(1) and two equivalent H(1) atoms. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2NiP2(H4O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.334
_cell_length_b   6.334
_cell_length_c   8.063
_cell_angle_alpha   113.126
_cell_angle_beta   113.125
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   269.005
_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
  V  V0  1  0.277  0.277  0.555  1.0
  V  V1  1  0.723  0.723  0.445  1.0
  Ni  Ni2  1  0.000  0.000  0.000  1.0
  P  P3  1  0.250  0.750  0.500  1.0
  P  P4  1  0.750  0.250  0.500  1.0
  H  H5  1  0.406  0.241  0.120  1.0
  H  H6  1  0.878  0.406  0.120  1.0
  H  H7  1  0.241  0.713  0.120  1.0
  H  H8  1  0.713  0.878  0.120  1.0
  H  H9  1  0.594  0.759  0.880  1.0
  H  H10  1  0.287  0.122  0.880  1.0
  H  H11  1  0.122  0.594  0.880  1.0
  H  H12  1  0.759  0.287  0.880  1.0
  O  O13  1  0.014  0.346  0.637  1.0
  O  O14  1  0.377  0.709  0.363  1.0
  O  O15  1  0.291  0.014  0.637  1.0
  O  O16  1  0.709  0.986  0.363  1.0
  O  O17  1  0.986  0.654  0.363  1.0
  O  O18  1  0.346  0.623  0.637  1.0
  O  O19  1  0.845  0.845  0.690  1.0
  O  O20  1  0.257  0.200  0.000  1.0
  O  O21  1  0.800  0.257  0.000  1.0
  O  O22  1  0.200  0.743  0.000  1.0
  O  O23  1  0.743  0.800  0.000  1.0
  O  O24  1  0.623  0.291  0.637  1.0
  O  O25  1  0.654  0.377  0.363  1.0
  O  O26  1  0.155  0.155  0.310  1.0
[/CIF]
.