The structure described by V4PbBi6O20 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(6), one O(8), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Pb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. In the second V site, V(2) is bonded to one O(1), one O(10), one O(5), and one O(7) atom to form VO4 tetrahedra that share  an edgeedge with one Pb(1)O6 octahedra. Pb(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(9) atoms to form distorted PbO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra and edges with two equivalent V(2)O4 tetrahedra. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(10), one O(2), one O(4), one O(5), one O(6), one O(9), and two equivalent O(3) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(7) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Bi(3) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one V(1), one Bi(2), and one Bi(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form distorted edge-sharing OBi4 tetrahedra. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one V(2), one Bi(1), and one Bi(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one V(1), one Bi(1), and one Bi(2) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one V(2), one Bi(1), and one Bi(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one V(1) and one Bi(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one V(1), one Pb(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V4Bi6PbO20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.250
_cell_length_b   8.086
_cell_length_c   9.476
_cell_angle_alpha   106.276
_cell_angle_beta   94.122
_cell_angle_gamma   112.302
_symmetry_Int_Tables_number   1
_cell_volume   483.367
_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  0.050  0.273  0.757  1.0
  V  V1  1  0.950  0.727  0.243  1.0
  V  V2  1  0.346  0.396  0.258  1.0
  V  V3  1  0.654  0.604  0.742  1.0
  Bi  Bi4  1  0.344  0.125  0.519  1.0
  Bi  Bi5  1  0.656  0.875  0.481  1.0
  Bi  Bi6  1  0.433  0.801  0.083  1.0
  Bi  Bi7  1  0.567  0.199  0.917  1.0
  Bi  Bi8  1  0.799  0.290  0.327  1.0
  Bi  Bi9  1  0.201  0.710  0.673  1.0
  Pb  Pb10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.106  0.248  0.273  1.0
  O  O12  1  0.894  0.752  0.727  1.0
  O  O13  1  0.161  0.521  0.832  1.0
  O  O14  1  0.839  0.479  0.168  1.0
  O  O15  1  0.662  0.093  0.104  1.0
  O  O16  1  0.338  0.907  0.896  1.0
  O  O17  1  0.549  0.032  0.366  1.0
  O  O18  1  0.451  0.968  0.634  1.0
  O  O19  1  0.377  0.633  0.308  1.0
  O  O20  1  0.623  0.367  0.692  1.0
  O  O21  1  0.233  0.181  0.754  1.0
  O  O22  1  0.767  0.819  0.246  1.0
  O  O23  1  0.533  0.377  0.370  1.0
  O  O24  1  0.467  0.623  0.630  1.0
  O  O25  1  0.063  0.799  0.431  1.0
  O  O26  1  0.937  0.201  0.569  1.0
  O  O27  1  0.132  0.833  0.145  1.0
  O  O28  1  0.868  0.167  0.855  1.0
  O  O29  1  0.355  0.305  0.071  1.0
  O  O30  1  0.645  0.695  0.929  1.0
[/CIF]
.
The structure described by V4PbBi6O20 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(6), one O(8), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Pb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. In the second V site, V(2) is bonded to one O(1), one O(10), one O(5), and one O(7) atom to form VO4 tetrahedra that share  an edgeedge with one Pb(1)O6 octahedra. Pb(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(9) atoms to form distorted PbO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra and edges with two equivalent V(2)O4 tetrahedra. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(10), one O(2), one O(4), one O(5), one O(6), one O(9), and two equivalent O(3) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(7) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Bi(3) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one V(1), one Bi(2), and one Bi(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the fourth O site, O(4) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form distorted edge-sharing OBi4 tetrahedra. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one V(2), one Bi(1), and one Bi(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one V(1), one Bi(1), and one Bi(2) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to one V(2), one Bi(1), and one Bi(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one V(1) and one Bi(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one V(1), one Pb(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_V4Bi6PbO20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.250
_cell_length_b   8.086
_cell_length_c   9.476
_cell_angle_alpha   106.276
_cell_angle_beta   94.122
_cell_angle_gamma   112.302
_symmetry_Int_Tables_number   1
_cell_volume   483.367
_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  0.050  0.273  0.757  1.0
  V  V1  1  0.950  0.727  0.243  1.0
  V  V2  1  0.346  0.396  0.258  1.0
  V  V3  1  0.654  0.604  0.742  1.0
  Bi  Bi4  1  0.344  0.125  0.519  1.0
  Bi  Bi5  1  0.656  0.875  0.481  1.0
  Bi  Bi6  1  0.433  0.801  0.083  1.0
  Bi  Bi7  1  0.567  0.199  0.917  1.0
  Bi  Bi8  1  0.799  0.290  0.327  1.0
  Bi  Bi9  1  0.201  0.710  0.673  1.0
  Pb  Pb10  1  0.000  0.000  0.000  1.0
  O  O11  1  0.106  0.248  0.273  1.0
  O  O12  1  0.894  0.752  0.727  1.0
  O  O13  1  0.161  0.521  0.832  1.0
  O  O14  1  0.839  0.479  0.168  1.0
  O  O15  1  0.662  0.093  0.104  1.0
  O  O16  1  0.338  0.907  0.896  1.0
  O  O17  1  0.549  0.032  0.366  1.0
  O  O18  1  0.451  0.968  0.634  1.0
  O  O19  1  0.377  0.633  0.308  1.0
  O  O20  1  0.623  0.367  0.692  1.0
  O  O21  1  0.233  0.181  0.754  1.0
  O  O22  1  0.767  0.819  0.246  1.0
  O  O23  1  0.533  0.377  0.370  1.0
  O  O24  1  0.467  0.623  0.630  1.0
  O  O25  1  0.063  0.799  0.431  1.0
  O  O26  1  0.937  0.201  0.569  1.0
  O  O27  1  0.132  0.833  0.145  1.0
  O  O28  1  0.868  0.167  0.855  1.0
  O  O29  1  0.355  0.305  0.071  1.0
  O  O30  1  0.645  0.695  0.929  1.0
[/CIF]
.