The structure described by Bi4V2O11 crystallizes in the monoclinic Pc space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(3), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form corner-sharing VO4 tetrahedra. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(4), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(4), and one O(5) atom. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom to form distorted edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom to form edge-sharing OBi4 tetrahedra. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one V(1) and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one V(1) and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one V(1) and one V(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one V(2) and one Bi(1) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(2) and one Bi(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one V(1) and one Bi(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Bi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.002
_cell_length_b   5.671
_cell_length_c   15.904
_cell_angle_alpha   90.000
_cell_angle_beta   109.329
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   510.858
_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  0.080  0.988  0.492  1.0
  V  V1  1  0.001  0.997  0.007  1.0
  V  V2  1  0.501  0.503  0.507  1.0
  V  V3  1  0.580  0.512  0.992  1.0
  Bi  Bi4  1  0.129  0.496  0.647  1.0
  Bi  Bi5  1  0.304  0.994  0.824  1.0
  Bi  Bi6  1  0.204  0.481  0.161  1.0
  Bi  Bi7  1  0.279  0.980  0.311  1.0
  Bi  Bi8  1  0.704  0.019  0.661  1.0
  Bi  Bi9  1  0.779  0.520  0.811  1.0
  Bi  Bi10  1  0.629  0.004  0.147  1.0
  Bi  Bi11  1  0.804  0.506  0.324  1.0
  O  O12  1  0.036  0.236  0.740  1.0
  O  O13  1  0.025  0.758  0.743  1.0
  O  O14  1  0.460  0.289  0.039  1.0
  O  O15  1  0.035  0.238  0.231  1.0
  O  O16  1  0.034  0.711  0.240  1.0
  O  O17  1  0.464  0.500  0.877  1.0
  O  O18  1  0.351  0.241  0.512  1.0
  O  O19  1  0.355  0.771  0.514  1.0
  O  O20  1  0.535  0.262  0.731  1.0
  O  O21  1  0.534  0.789  0.740  1.0
  O  O22  1  0.228  0.003  0.110  1.0
  O  O23  1  0.851  0.259  0.012  1.0
  O  O24  1  0.539  0.499  0.404  1.0
  O  O25  1  0.728  0.497  0.610  1.0
  O  O26  1  0.441  0.743  0.024  1.0
  O  O27  1  0.536  0.264  0.240  1.0
  O  O28  1  0.525  0.742  0.243  1.0
  O  O29  1  0.039  0.001  0.904  1.0
  O  O30  1  0.960  0.211  0.539  1.0
  O  O31  1  0.941  0.757  0.524  1.0
  O  O32  1  0.964  0.000  0.377  1.0
  O  O33  1  0.855  0.729  0.014  1.0
[/CIF]
.
The structure described by Bi4V2O11 crystallizes in the monoclinic Pc space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(3), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form corner-sharing VO4 tetrahedra. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(4), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(4), and one O(5) atom. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(4), and one O(5) atom. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom to form distorted edge-sharing OBi4 tetrahedra. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom to form edge-sharing OBi4 tetrahedra. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one V(1) and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one V(1) and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one V(1) and one V(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one V(2) and one Bi(1) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(2) and one Bi(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one V(1) and one Bi(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Bi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.002
_cell_length_b   5.671
_cell_length_c   15.904
_cell_angle_alpha   90.000
_cell_angle_beta   109.329
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   510.858
_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  0.080  0.988  0.492  1.0
  V  V1  1  0.001  0.997  0.007  1.0
  V  V2  1  0.501  0.503  0.507  1.0
  V  V3  1  0.580  0.512  0.992  1.0
  Bi  Bi4  1  0.129  0.496  0.647  1.0
  Bi  Bi5  1  0.304  0.994  0.824  1.0
  Bi  Bi6  1  0.204  0.481  0.161  1.0
  Bi  Bi7  1  0.279  0.980  0.311  1.0
  Bi  Bi8  1  0.704  0.019  0.661  1.0
  Bi  Bi9  1  0.779  0.520  0.811  1.0
  Bi  Bi10  1  0.629  0.004  0.147  1.0
  Bi  Bi11  1  0.804  0.506  0.324  1.0
  O  O12  1  0.036  0.236  0.740  1.0
  O  O13  1  0.025  0.758  0.743  1.0
  O  O14  1  0.460  0.289  0.039  1.0
  O  O15  1  0.035  0.238  0.231  1.0
  O  O16  1  0.034  0.711  0.240  1.0
  O  O17  1  0.464  0.500  0.877  1.0
  O  O18  1  0.351  0.241  0.512  1.0
  O  O19  1  0.355  0.771  0.514  1.0
  O  O20  1  0.535  0.262  0.731  1.0
  O  O21  1  0.534  0.789  0.740  1.0
  O  O22  1  0.228  0.003  0.110  1.0
  O  O23  1  0.851  0.259  0.012  1.0
  O  O24  1  0.539  0.499  0.404  1.0
  O  O25  1  0.728  0.497  0.610  1.0
  O  O26  1  0.441  0.743  0.024  1.0
  O  O27  1  0.536  0.264  0.240  1.0
  O  O28  1  0.525  0.742  0.243  1.0
  O  O29  1  0.039  0.001  0.904  1.0
  O  O30  1  0.960  0.211  0.539  1.0
  O  O31  1  0.941  0.757  0.524  1.0
  O  O32  1  0.964  0.000  0.377  1.0
  O  O33  1  0.855  0.729  0.014  1.0
[/CIF]
.