The crystal structure described by V4O7 crystallizes in the triclinic P-1 space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(6), one O(7), and two equivalent O(5) atoms to form distorted VO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 pentagonal pyramids, corners with two equivalent V(3)O5 trigonal bipyramids,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O5 trigonal bipyramid, and  a faceface with one V(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 19-20°. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(6) atoms to form distorted VO6 octahedra that share corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(4)O6 pentagonal pyramids, corners with three equivalent V(3)O5 trigonal bipyramids,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 19-20°. In the third V site, V(3) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(7) atom to form a mixture of distorted corner and edge-sharing VO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-75°. In the fourth V site, V(4) is bonded to one O(1), one O(3), one O(5), one O(7), and two equivalent O(2) atoms to form distorted VO6 pentagonal pyramids that share corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(2)O6 octahedra,  a cornercorner with one V(3)O5 trigonal bipyramid,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(4)O6 pentagonal pyramid, edges with two equivalent V(3)O5 trigonal bipyramids, and  a faceface with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-64°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one V(1), one V(2), one V(3), and one V(4) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one V(2), one V(3), and two equivalent V(4) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one V(1), one V(2), and one V(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one V(2) and one V(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one V(3), one V(4), and two equivalent V(1) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one V(1) and two equivalent V(2) atoms. In the seventh O site, O(7) is bonded in a T-shaped geometry to one V(1), one V(3), and one V(4) atom. is represented by the CIF card [CIF]
data_V4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.844
_cell_length_b   6.270
_cell_length_c   7.684
_cell_angle_alpha   74.373
_cell_angle_beta   74.912
_cell_angle_gamma   81.303
_symmetry_Int_Tables_number   1
_cell_volume   260.831
_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  0.653  0.097  0.289  1.0
  V  V1  1  0.347  0.903  0.711  1.0
  V  V2  1  0.474  0.414  0.838  1.0
  V  V3  1  0.526  0.586  0.162  1.0
  V  V4  1  0.099  0.247  0.259  1.0
  V  V5  1  0.901  0.753  0.741  1.0
  V  V6  1  0.162  0.337  0.607  1.0
  V  V7  1  0.838  0.663  0.393  1.0
  O  O8  1  0.765  0.369  0.336  1.0
  O  O9  1  0.235  0.631  0.664  1.0
  O  O10  1  0.176  0.512  0.334  1.0
  O  O11  1  0.824  0.488  0.666  1.0
  O  O12  1  0.580  0.812  0.267  1.0
  O  O13  1  0.420  0.188  0.733  1.0
  O  O14  1  0.829  0.671  0.973  1.0
  O  O15  1  0.171  0.329  0.027  1.0
  O  O16  1  0.679  0.884  0.567  1.0
  O  O17  1  0.321  0.116  0.433  1.0
  O  O18  1  0.401  0.713  0.922  1.0
  O  O19  1  0.599  0.287  0.077  1.0
  O  O20  1  0.030  0.031  0.726  1.0
  O  O21  1  0.970  0.969  0.274  1.0
[/CIF]
.
The crystal structure described by V4O7 crystallizes in the triclinic P-1 space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(3), one O(6), one O(7), and two equivalent O(5) atoms to form distorted VO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with two equivalent V(4)O6 pentagonal pyramids, corners with two equivalent V(3)O5 trigonal bipyramids,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(3)O5 trigonal bipyramid, and  a faceface with one V(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 19-20°. In the second V site, V(2) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(6) atoms to form distorted VO6 octahedra that share corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(4)O6 pentagonal pyramids, corners with three equivalent V(3)O5 trigonal bipyramids,  an edgeedge with one V(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(4)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 19-20°. In the third V site, V(3) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(7) atom to form a mixture of distorted corner and edge-sharing VO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-75°. In the fourth V site, V(4) is bonded to one O(1), one O(3), one O(5), one O(7), and two equivalent O(2) atoms to form distorted VO6 pentagonal pyramids that share corners with two equivalent V(1)O6 octahedra, corners with two equivalent V(2)O6 octahedra,  a cornercorner with one V(3)O5 trigonal bipyramid,  an edgeedge with one V(2)O6 octahedra,  an edgeedge with one V(4)O6 pentagonal pyramid, edges with two equivalent V(3)O5 trigonal bipyramids, and  a faceface with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-64°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one V(1), one V(2), one V(3), and one V(4) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one V(2), one V(3), and two equivalent V(4) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one V(1), one V(2), and one V(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one V(2) and one V(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one V(3), one V(4), and two equivalent V(1) atoms. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one V(1) and two equivalent V(2) atoms. In the seventh O site, O(7) is bonded in a T-shaped geometry to one V(1), one V(3), and one V(4) atom. is represented by the CIF card [CIF]
data_V4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.844
_cell_length_b   6.270
_cell_length_c   7.684
_cell_angle_alpha   74.373
_cell_angle_beta   74.912
_cell_angle_gamma   81.303
_symmetry_Int_Tables_number   1
_cell_volume   260.831
_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  0.653  0.097  0.289  1.0
  V  V1  1  0.347  0.903  0.711  1.0
  V  V2  1  0.474  0.414  0.838  1.0
  V  V3  1  0.526  0.586  0.162  1.0
  V  V4  1  0.099  0.247  0.259  1.0
  V  V5  1  0.901  0.753  0.741  1.0
  V  V6  1  0.162  0.337  0.607  1.0
  V  V7  1  0.838  0.663  0.393  1.0
  O  O8  1  0.765  0.369  0.336  1.0
  O  O9  1  0.235  0.631  0.664  1.0
  O  O10  1  0.176  0.512  0.334  1.0
  O  O11  1  0.824  0.488  0.666  1.0
  O  O12  1  0.580  0.812  0.267  1.0
  O  O13  1  0.420  0.188  0.733  1.0
  O  O14  1  0.829  0.671  0.973  1.0
  O  O15  1  0.171  0.329  0.027  1.0
  O  O16  1  0.679  0.884  0.567  1.0
  O  O17  1  0.321  0.116  0.433  1.0
  O  O18  1  0.401  0.713  0.922  1.0
  O  O19  1  0.599  0.287  0.077  1.0
  O  O20  1  0.030  0.031  0.726  1.0
  O  O21  1  0.970  0.969  0.274  1.0
[/CIF]
.