The material described by V2Pb2Se2O11 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(4), one O(6), one O(7), one O(8), and two equivalent O(11) atoms. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(8), and one O(9) atom. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(8), and one O(9) atom. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(2), and one O(9) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are eleven inequivalent O sites. In the first O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one V(2) and two equivalent V(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Pb(2) and one Se(1) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one Pb(1), one Pb(2), and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Pb(1), and one Se(1) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Se(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Pb(1) and one Se(2) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one V(1) and one Se(2) atom. In the eighth O site, O(7) is bonded in a single-bond geometry to one V(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Pb(1) atom. In the tenth O site, O(9) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Pb(2) atom. In the eleventh O site, O(10) is bonded in a single-bond geometry to one V(2) and one Pb(2) atom. is represented by the CIF card [CIF]
data_V2Pb2Se2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.994
_cell_length_b   7.311
_cell_length_c   10.065
_cell_angle_alpha   96.422
_cell_angle_beta   93.907
_cell_angle_gamma   95.412
_symmetry_Int_Tables_number   1
_cell_volume   507.527
_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  0.655  0.161  0.449  1.0
  V  V1  1  0.345  0.839  0.551  1.0
  V  V2  1  0.336  0.943  0.247  1.0
  V  V3  1  0.664  0.057  0.753  1.0
  Pb  Pb4  1  0.821  0.854  0.107  1.0
  Pb  Pb5  1  0.179  0.146  0.893  1.0
  Pb  Pb6  1  0.136  0.452  0.250  1.0
  Pb  Pb7  1  0.864  0.548  0.750  1.0
  Se  Se8  1  0.668  0.339  0.046  1.0
  Se  Se9  1  0.332  0.661  0.954  1.0
  Se  Se10  1  0.659  0.597  0.399  1.0
  Se  Se11  1  0.341  0.403  0.601  1.0
  O  O12  1  0.883  0.249  0.077  1.0
  O  O13  1  0.117  0.751  0.923  1.0
  O  O14  1  0.733  0.529  0.962  1.0
  O  O15  1  0.267  0.471  0.038  1.0
  O  O16  1  0.549  0.180  0.911  1.0
  O  O17  1  0.451  0.820  0.089  1.0
  O  O18  1  0.446  0.700  0.369  1.0
  O  O19  1  0.554  0.300  0.631  1.0
  O  O20  1  0.768  0.605  0.253  1.0
  O  O21  1  0.232  0.395  0.747  1.0
  O  O22  1  0.537  0.370  0.374  1.0
  O  O23  1  0.463  0.630  0.626  1.0
  O  O24  1  0.877  0.266  0.469  1.0
  O  O25  1  0.123  0.734  0.531  1.0
  O  O26  1  0.633  0.025  0.291  1.0
  O  O27  1  0.367  0.975  0.709  1.0
  O  O28  1  0.133  0.783  0.226  1.0
  O  O29  1  0.867  0.217  0.774  1.0
  O  O30  1  0.260  0.123  0.176  1.0
  O  O31  1  0.740  0.877  0.824  1.0
  O  O32  1  0.337  0.024  0.433  1.0
  O  O33  1  0.663  0.976  0.567  1.0
[/CIF]
.
The material described by V2Pb2Se2O11 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(4), one O(6), one O(7), one O(8), and two equivalent O(11) atoms. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(8), and one O(9) atom. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(8), and one O(9) atom. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(2), and one O(9) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are eleven inequivalent O sites. In the first O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one V(2) and two equivalent V(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Pb(2) and one Se(1) atom. In the third O site, O(2) is bonded in a 3-coordinate geometry to one Pb(1), one Pb(2), and one Se(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one V(2), one Pb(1), and one Se(1) atom. In the fifth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Se(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Pb(1) and one Se(2) atom. In the seventh O site, O(6) is bonded in a bent 120 degrees geometry to one V(1) and one Se(2) atom. In the eighth O site, O(7) is bonded in a single-bond geometry to one V(1) atom. In the ninth O site, O(8) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Pb(1) atom. In the tenth O site, O(9) is bonded in a distorted single-bond geometry to one V(2), one Pb(1), and one Pb(2) atom. In the eleventh O site, O(10) is bonded in a single-bond geometry to one V(2) and one Pb(2) atom. is represented by the CIF card [CIF]
data_V2Pb2Se2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.994
_cell_length_b   7.311
_cell_length_c   10.065
_cell_angle_alpha   96.422
_cell_angle_beta   93.907
_cell_angle_gamma   95.412
_symmetry_Int_Tables_number   1
_cell_volume   507.527
_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  0.655  0.161  0.449  1.0
  V  V1  1  0.345  0.839  0.551  1.0
  V  V2  1  0.336  0.943  0.247  1.0
  V  V3  1  0.664  0.057  0.753  1.0
  Pb  Pb4  1  0.821  0.854  0.107  1.0
  Pb  Pb5  1  0.179  0.146  0.893  1.0
  Pb  Pb6  1  0.136  0.452  0.250  1.0
  Pb  Pb7  1  0.864  0.548  0.750  1.0
  Se  Se8  1  0.668  0.339  0.046  1.0
  Se  Se9  1  0.332  0.661  0.954  1.0
  Se  Se10  1  0.659  0.597  0.399  1.0
  Se  Se11  1  0.341  0.403  0.601  1.0
  O  O12  1  0.883  0.249  0.077  1.0
  O  O13  1  0.117  0.751  0.923  1.0
  O  O14  1  0.733  0.529  0.962  1.0
  O  O15  1  0.267  0.471  0.038  1.0
  O  O16  1  0.549  0.180  0.911  1.0
  O  O17  1  0.451  0.820  0.089  1.0
  O  O18  1  0.446  0.700  0.369  1.0
  O  O19  1  0.554  0.300  0.631  1.0
  O  O20  1  0.768  0.605  0.253  1.0
  O  O21  1  0.232  0.395  0.747  1.0
  O  O22  1  0.537  0.370  0.374  1.0
  O  O23  1  0.463  0.630  0.626  1.0
  O  O24  1  0.877  0.266  0.469  1.0
  O  O25  1  0.123  0.734  0.531  1.0
  O  O26  1  0.633  0.025  0.291  1.0
  O  O27  1  0.367  0.975  0.709  1.0
  O  O28  1  0.133  0.783  0.226  1.0
  O  O29  1  0.867  0.217  0.774  1.0
  O  O30  1  0.260  0.123  0.176  1.0
  O  O31  1  0.740  0.877  0.824  1.0
  O  O32  1  0.337  0.024  0.433  1.0
  O  O33  1  0.663  0.976  0.567  1.0
[/CIF]
.