The compound described by Bi4V2O11 crystallizes in the monoclinic P2_1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(11), one O(2), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one Bi(3)O5 square pyramid. In the second V site, V(2) is bonded to one O(3), one O(7), one O(8), and one O(9) atom to form VO4 tetrahedra that share corners with two equivalent Bi(3)O5 square pyramids. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(4), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(4), and one O(5) atom. In the third Bi site, Bi(3) is bonded to one O(1), one O(10), one O(6), one O(7), and one O(8) atom to form distorted BiO5 square pyramids that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent V(2)O4 tetrahedra. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(6), and one O(8) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one V(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one V(2) and one Bi(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one V(1) and one Bi(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Bi(3) and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one V(2) and one Bi(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one V(2), one Bi(3), and one Bi(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one V(2) and one Bi(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one V(1), one Bi(2), and one Bi(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one V(1) and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Bi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.445
_cell_length_b   7.270
_cell_length_c   8.570
_cell_angle_alpha   77.054
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   573.527
_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  0.176  0.388  0.427  1.0
  V  V1  1  0.678  0.884  0.951  1.0
  V  V2  1  0.178  0.116  0.049  1.0
  V  V3  1  0.676  0.612  0.573  1.0
  Bi  Bi4  1  0.455  0.834  0.309  1.0
  Bi  Bi5  1  0.071  0.772  0.503  1.0
  Bi  Bi6  1  0.052  0.651  0.017  1.0
  Bi  Bi7  1  0.330  0.872  0.780  1.0
  Bi  Bi8  1  0.830  0.128  0.220  1.0
  Bi  Bi9  1  0.552  0.349  0.983  1.0
  Bi  Bi10  1  0.955  0.166  0.691  1.0
  Bi  Bi11  1  0.571  0.228  0.497  1.0
  O  O12  1  0.097  0.841  0.737  1.0
  O  O13  1  0.598  0.840  0.524  1.0
  O  O14  1  0.233  0.122  0.852  1.0
  O  O15  1  0.801  0.185  0.506  1.0
  O  O16  1  0.639  0.526  0.399  1.0
  O  O17  1  0.774  0.320  0.004  1.0
  O  O18  1  0.588  0.680  0.942  1.0
  O  O19  1  0.554  0.066  0.892  1.0
  O  O20  1  0.326  0.078  0.172  1.0
  O  O21  1  0.582  0.446  0.714  1.0
  O  O22  1  0.852  0.606  0.615  1.0
  O  O23  1  0.082  0.554  0.286  1.0
  O  O24  1  0.352  0.394  0.385  1.0
  O  O25  1  0.054  0.934  0.108  1.0
  O  O26  1  0.826  0.922  0.828  1.0
  O  O27  1  0.088  0.320  0.058  1.0
  O  O28  1  0.139  0.474  0.601  1.0
  O  O29  1  0.301  0.815  0.494  1.0
  O  O30  1  0.733  0.878  0.148  1.0
  O  O31  1  0.274  0.680  0.996  1.0
  O  O32  1  0.597  0.159  0.263  1.0
  O  O33  1  0.098  0.160  0.476  1.0
[/CIF]
.
The compound described by Bi4V2O11 crystallizes in the monoclinic P2_1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(11), one O(2), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one Bi(3)O5 square pyramid. In the second V site, V(2) is bonded to one O(3), one O(7), one O(8), and one O(9) atom to form VO4 tetrahedra that share corners with two equivalent Bi(3)O5 square pyramids. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(4), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(4), and one O(5) atom. In the third Bi site, Bi(3) is bonded to one O(1), one O(10), one O(6), one O(7), and one O(8) atom to form distorted BiO5 square pyramids that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent V(2)O4 tetrahedra. In the fourth Bi site, Bi(4) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(6), and one O(8) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted tetrahedral geometry to one Bi(1), one Bi(2), one Bi(3), and one Bi(4) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one V(1), one Bi(1), and one Bi(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one V(2) and one Bi(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one V(1) and one Bi(2) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Bi(3) and one Bi(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one V(2) and one Bi(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one V(2), one Bi(3), and one Bi(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one V(2) and one Bi(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one V(1), one Bi(2), and one Bi(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one V(1) and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V2Bi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.445
_cell_length_b   7.270
_cell_length_c   8.570
_cell_angle_alpha   77.054
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   573.527
_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  0.176  0.388  0.427  1.0
  V  V1  1  0.678  0.884  0.951  1.0
  V  V2  1  0.178  0.116  0.049  1.0
  V  V3  1  0.676  0.612  0.573  1.0
  Bi  Bi4  1  0.455  0.834  0.309  1.0
  Bi  Bi5  1  0.071  0.772  0.503  1.0
  Bi  Bi6  1  0.052  0.651  0.017  1.0
  Bi  Bi7  1  0.330  0.872  0.780  1.0
  Bi  Bi8  1  0.830  0.128  0.220  1.0
  Bi  Bi9  1  0.552  0.349  0.983  1.0
  Bi  Bi10  1  0.955  0.166  0.691  1.0
  Bi  Bi11  1  0.571  0.228  0.497  1.0
  O  O12  1  0.097  0.841  0.737  1.0
  O  O13  1  0.598  0.840  0.524  1.0
  O  O14  1  0.233  0.122  0.852  1.0
  O  O15  1  0.801  0.185  0.506  1.0
  O  O16  1  0.639  0.526  0.399  1.0
  O  O17  1  0.774  0.320  0.004  1.0
  O  O18  1  0.588  0.680  0.942  1.0
  O  O19  1  0.554  0.066  0.892  1.0
  O  O20  1  0.326  0.078  0.172  1.0
  O  O21  1  0.582  0.446  0.714  1.0
  O  O22  1  0.852  0.606  0.615  1.0
  O  O23  1  0.082  0.554  0.286  1.0
  O  O24  1  0.352  0.394  0.385  1.0
  O  O25  1  0.054  0.934  0.108  1.0
  O  O26  1  0.826  0.922  0.828  1.0
  O  O27  1  0.088  0.320  0.058  1.0
  O  O28  1  0.139  0.474  0.601  1.0
  O  O29  1  0.301  0.815  0.494  1.0
  O  O30  1  0.733  0.878  0.148  1.0
  O  O31  1  0.274  0.680  0.996  1.0
  O  O32  1  0.597  0.159  0.263  1.0
  O  O33  1  0.098  0.160  0.476  1.0
[/CIF]
.