The structure described by Co2V2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form VO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and  a cornercorner with one V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-62°. In the second V site, V(2) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form VO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, and  a cornercorner with one V(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-59°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra, corners with three equivalent V(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra, corners with four equivalent V(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one V(1) and one Co(2) atom. In the second O site, O(6) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. In the third O site, O(7) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Co(1) atoms. In the fourth O site, O(1) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Co(2) atom. In the fifth O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1), one Co(1), and one Co(2) atom. In the sixth O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. In the seventh O site, O(4) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Co2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.299
_cell_length_b   6.571
_cell_length_c   9.406
_cell_angle_alpha   79.911
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.983
_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
  V  V0  1  0.259  0.636  0.031  1.0
  V  V1  1  0.759  0.364  0.469  1.0
  V  V2  1  0.741  0.364  0.969  1.0
  V  V3  1  0.241  0.636  0.531  1.0
  V  V4  1  0.519  0.804  0.312  1.0
  V  V5  1  0.019  0.196  0.188  1.0
  V  V6  1  0.481  0.196  0.688  1.0
  V  V7  1  0.981  0.804  0.812  1.0
  Co  Co8  1  0.622  0.856  0.963  1.0
  Co  Co9  1  0.122  0.144  0.537  1.0
  Co  Co10  1  0.378  0.144  0.037  1.0
  Co  Co11  1  0.878  0.856  0.463  1.0
  Co  Co12  1  0.888  0.698  0.179  1.0
  Co  Co13  1  0.388  0.302  0.321  1.0
  Co  Co14  1  0.112  0.302  0.821  1.0
  Co  Co15  1  0.612  0.698  0.679  1.0
  O  O16  1  0.632  0.396  0.625  1.0
  O  O17  1  0.132  0.604  0.875  1.0
  O  O18  1  0.368  0.604  0.375  1.0
  O  O19  1  0.868  0.396  0.125  1.0
  O  O20  1  0.627  0.575  0.894  1.0
  O  O21  1  0.127  0.425  0.606  1.0
  O  O22  1  0.373  0.425  0.106  1.0
  O  O23  1  0.873  0.575  0.394  1.0
  O  O24  1  0.868  0.828  0.961  1.0
  O  O25  1  0.368  0.172  0.539  1.0
  O  O26  1  0.132  0.172  0.039  1.0
  O  O27  1  0.632  0.828  0.461  1.0
  O  O28  1  0.856  0.747  0.680  1.0
  O  O29  1  0.356  0.253  0.820  1.0
  O  O30  1  0.144  0.253  0.320  1.0
  O  O31  1  0.644  0.747  0.180  1.0
  O  O32  1  0.878  0.323  0.848  1.0
  O  O33  1  0.378  0.677  0.652  1.0
  O  O34  1  0.122  0.677  0.152  1.0
  O  O35  1  0.622  0.323  0.348  1.0
  O  O36  1  0.583  0.972  0.748  1.0
  O  O37  1  0.083  0.028  0.752  1.0
  O  O38  1  0.417  0.028  0.252  1.0
  O  O39  1  0.917  0.972  0.248  1.0
  O  O40  1  0.880  0.148  0.506  1.0
  O  O41  1  0.380  0.852  0.994  1.0
  O  O42  1  0.120  0.852  0.494  1.0
  O  O43  1  0.620  0.148  0.006  1.0
[/CIF]
.
The structure described by Co2V2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form VO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O6 octahedra, and  a cornercorner with one V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 38-62°. In the second V site, V(2) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form VO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, and  a cornercorner with one V(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-59°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra, corners with three equivalent V(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form CoO6 octahedra that share corners with three equivalent V(1)O4 tetrahedra, corners with four equivalent V(2)O4 tetrahedra, and edges with two equivalent Co(1)O6 octahedra. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one V(1) and one Co(2) atom. In the second O site, O(6) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. In the third O site, O(7) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent Co(1) atoms. In the fourth O site, O(1) is bonded in a trigonal planar geometry to one V(1), one V(2), and one Co(2) atom. In the fifth O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1), one Co(1), and one Co(2) atom. In the sixth O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. In the seventh O site, O(4) is bonded in a distorted trigonal planar geometry to one V(2), one Co(1), and one Co(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Co2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.299
_cell_length_b   6.571
_cell_length_c   9.406
_cell_angle_alpha   79.911
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.983
_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
  V  V0  1  0.259  0.636  0.031  1.0
  V  V1  1  0.759  0.364  0.469  1.0
  V  V2  1  0.741  0.364  0.969  1.0
  V  V3  1  0.241  0.636  0.531  1.0
  V  V4  1  0.519  0.804  0.312  1.0
  V  V5  1  0.019  0.196  0.188  1.0
  V  V6  1  0.481  0.196  0.688  1.0
  V  V7  1  0.981  0.804  0.812  1.0
  Co  Co8  1  0.622  0.856  0.963  1.0
  Co  Co9  1  0.122  0.144  0.537  1.0
  Co  Co10  1  0.378  0.144  0.037  1.0
  Co  Co11  1  0.878  0.856  0.463  1.0
  Co  Co12  1  0.888  0.698  0.179  1.0
  Co  Co13  1  0.388  0.302  0.321  1.0
  Co  Co14  1  0.112  0.302  0.821  1.0
  Co  Co15  1  0.612  0.698  0.679  1.0
  O  O16  1  0.632  0.396  0.625  1.0
  O  O17  1  0.132  0.604  0.875  1.0
  O  O18  1  0.368  0.604  0.375  1.0
  O  O19  1  0.868  0.396  0.125  1.0
  O  O20  1  0.627  0.575  0.894  1.0
  O  O21  1  0.127  0.425  0.606  1.0
  O  O22  1  0.373  0.425  0.106  1.0
  O  O23  1  0.873  0.575  0.394  1.0
  O  O24  1  0.868  0.828  0.961  1.0
  O  O25  1  0.368  0.172  0.539  1.0
  O  O26  1  0.132  0.172  0.039  1.0
  O  O27  1  0.632  0.828  0.461  1.0
  O  O28  1  0.856  0.747  0.680  1.0
  O  O29  1  0.356  0.253  0.820  1.0
  O  O30  1  0.144  0.253  0.320  1.0
  O  O31  1  0.644  0.747  0.180  1.0
  O  O32  1  0.878  0.323  0.848  1.0
  O  O33  1  0.378  0.677  0.652  1.0
  O  O34  1  0.122  0.677  0.152  1.0
  O  O35  1  0.622  0.323  0.348  1.0
  O  O36  1  0.583  0.972  0.748  1.0
  O  O37  1  0.083  0.028  0.752  1.0
  O  O38  1  0.417  0.028  0.252  1.0
  O  O39  1  0.917  0.972  0.248  1.0
  O  O40  1  0.880  0.148  0.506  1.0
  O  O41  1  0.380  0.852  0.994  1.0
  O  O42  1  0.120  0.852  0.494  1.0
  O  O43  1  0.620  0.148  0.006  1.0
[/CIF]
.