The material described by Cu11V6O26 crystallizes in the triclinic P-1 space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra,  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 34°. In the second V site, V(2) is bonded to one O(11), one O(12), one O(13), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra,  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, corners with two equivalent Cu(1)O5 trigonal bipyramids, and corners with two equivalent Cu(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. In the third V site, V(3) is bonded to one O(1), one O(10), one O(5), and one O(8) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra, corners with two equivalent Cu(4)O5 square pyramids,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, and  a cornercorner with one Cu(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 55°. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(11), one O(4), one O(6), one O(8), and one O(9) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent Cu(2)O5 trigonal bipyramids,  an edgeedge with one Cu(6)O6 octahedra,  an edgeedge with one Cu(4)O5 square pyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(12), one O(4), one O(5), one O(6), and one O(7) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent Cu(1)O5 trigonal bipyramids,  an edgeedge with one Cu(6)O6 octahedra, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the third Cu site, Cu(3) is bonded to one O(10), one O(11), one O(12), one O(2), and one O(4) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  an edgeedge with one Cu(4)O5 square pyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(2)O5 trigonal bipyramid. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(13), one O(3), one O(4), and one O(8) atom to form CuO5 square pyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the fifth Cu site, Cu(5) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(3), one O(5), one O(7), and one O(9) atom. In the sixth Cu site, Cu(6) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms to form CuO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra, edges with two equivalent Cu(1)O5 trigonal bipyramids, and edges with two equivalent Cu(2)O5 trigonal bipyramids. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(3) and one Cu(5) atom. In the second O site, O(2) is bonded in a linear geometry to one V(1) and one Cu(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cu(4), and one Cu(5) atom. In the fourth O site, O(4) is bonded to one Cu(1), one Cu(2), one Cu(3), and one Cu(4) atom to form distorted corner-sharing OCu4 tetrahedra. In the fifth O site, O(5) is bonded to one V(3), one Cu(2), one Cu(5), and one Cu(6) atom to form distorted OVCu3 trigonal pyramids that share  a cornercorner with one O(4)Cu4 tetrahedra and  a cornercorner with one O(5)VCu3 trigonal pyramid. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one V(1), one Cu(1), one Cu(2), and one Cu(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one Cu(2), and one Cu(5) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one V(3), one Cu(1), and one Cu(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), one Cu(5), and one Cu(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one V(3), one Cu(3), and one Cu(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), and one Cu(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one V(2), one Cu(2), and one Cu(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one V(2), one Cu(4), and one Cu(5) atom. is represented by the CIF file [CIF]
data_V6Cu11O26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.183
_cell_length_b   8.310
_cell_length_c   8.325
_cell_angle_alpha   106.217
_cell_angle_beta   91.591
_cell_angle_gamma   107.104
_symmetry_Int_Tables_number   1
_cell_volume   515.785
_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  0.265  0.937  0.586  1.0
  V  V1  1  0.735  0.063  0.414  1.0
  V  V2  1  0.081  0.439  0.190  1.0
  V  V3  1  0.919  0.561  0.810  1.0
  V  V4  1  0.566  0.756  0.907  1.0
  V  V5  1  0.434  0.244  0.093  1.0
  Cu  Cu6  1  0.132  0.256  0.789  1.0
  Cu  Cu7  1  0.855  0.853  0.630  1.0
  Cu  Cu8  1  0.145  0.147  0.370  1.0
  Cu  Cu9  1  0.868  0.744  0.211  1.0
  Cu  Cu10  1  0.277  0.511  0.578  1.0
  Cu  Cu11  1  0.723  0.489  0.422  1.0
  Cu  Cu12  1  0.499  0.338  0.708  1.0
  Cu  Cu13  1  0.501  0.662  0.292  1.0
  Cu  Cu14  1  0.718  0.143  0.836  1.0
  Cu  Cu15  1  0.282  0.857  0.164  1.0
  Cu  Cu16  1  0.000  0.000  0.000  1.0
  O  O17  1  0.392  0.822  0.963  1.0
  O  O18  1  0.608  0.178  0.037  1.0
  O  O19  1  0.717  0.264  0.428  1.0
  O  O20  1  0.283  0.736  0.572  1.0
  O  O21  1  0.533  0.907  0.334  1.0
  O  O22  1  0.467  0.093  0.666  1.0
  O  O23  1  0.734  0.719  0.403  1.0
  O  O24  1  0.266  0.281  0.597  1.0
  O  O25  1  0.241  0.072  0.123  1.0
  O  O26  1  0.759  0.928  0.877  1.0
  O  O27  1  0.113  0.995  0.722  1.0
  O  O28  1  0.887  0.005  0.278  1.0
  O  O29  1  0.184  0.929  0.376  1.0
  O  O30  1  0.816  0.071  0.624  1.0
  O  O31  1  0.372  0.323  0.945  1.0
  O  O32  1  0.628  0.677  0.055  1.0
  O  O33  1  0.027  0.248  0.004  1.0
  O  O34  1  0.498  0.426  0.286  1.0
  O  O35  1  0.502  0.574  0.714  1.0
  O  O36  1  0.913  0.525  0.212  1.0
  O  O37  1  0.087  0.475  0.788  1.0
  O  O38  1  0.973  0.752  0.996  1.0
  O  O39  1  0.116  0.370  0.367  1.0
  O  O40  1  0.266  0.613  0.186  1.0
  O  O41  1  0.734  0.387  0.814  1.0
  O  O42  1  0.884  0.630  0.633  1.0
[/CIF]
.
The material described by Cu11V6O26 crystallizes in the triclinic P-1 space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra,  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 34°. In the second V site, V(2) is bonded to one O(11), one O(12), one O(13), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra,  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, corners with two equivalent Cu(1)O5 trigonal bipyramids, and corners with two equivalent Cu(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. In the third V site, V(3) is bonded to one O(1), one O(10), one O(5), and one O(8) atom to form VO4 tetrahedra that share  a cornercorner with one Cu(6)O6 octahedra, corners with two equivalent Cu(4)O5 square pyramids,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, and  a cornercorner with one Cu(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 55°. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(11), one O(4), one O(6), one O(8), and one O(9) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent Cu(2)O5 trigonal bipyramids,  an edgeedge with one Cu(6)O6 octahedra,  an edgeedge with one Cu(4)O5 square pyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(12), one O(4), one O(5), one O(6), and one O(7) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one Cu(4)O5 square pyramid,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent Cu(1)O5 trigonal bipyramids,  an edgeedge with one Cu(6)O6 octahedra, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the third Cu site, Cu(3) is bonded to one O(10), one O(11), one O(12), one O(2), and one O(4) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra,  an edgeedge with one Cu(4)O5 square pyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(2)O5 trigonal bipyramid. In the fourth Cu site, Cu(4) is bonded to one O(10), one O(13), one O(3), one O(4), and one O(8) atom to form CuO5 square pyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  an edgeedge with one Cu(1)O5 trigonal bipyramid, and  an edgeedge with one Cu(3)O5 trigonal bipyramid. In the fifth Cu site, Cu(5) is bonded in a 6-coordinate geometry to one O(1), one O(13), one O(3), one O(5), one O(7), and one O(9) atom. In the sixth Cu site, Cu(6) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms to form CuO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra, edges with two equivalent Cu(1)O5 trigonal bipyramids, and edges with two equivalent Cu(2)O5 trigonal bipyramids. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one V(3) and one Cu(5) atom. In the second O site, O(2) is bonded in a linear geometry to one V(1) and one Cu(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cu(4), and one Cu(5) atom. In the fourth O site, O(4) is bonded to one Cu(1), one Cu(2), one Cu(3), and one Cu(4) atom to form distorted corner-sharing OCu4 tetrahedra. In the fifth O site, O(5) is bonded to one V(3), one Cu(2), one Cu(5), and one Cu(6) atom to form distorted OVCu3 trigonal pyramids that share  a cornercorner with one O(4)Cu4 tetrahedra and  a cornercorner with one O(5)VCu3 trigonal pyramid. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one V(1), one Cu(1), one Cu(2), and one Cu(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one Cu(2), and one Cu(5) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one V(3), one Cu(1), and one Cu(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), one Cu(5), and one Cu(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one V(3), one Cu(3), and one Cu(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), and one Cu(3) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one V(2), one Cu(2), and one Cu(3) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one V(2), one Cu(4), and one Cu(5) atom. is represented by the CIF file [CIF]
data_V6Cu11O26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.183
_cell_length_b   8.310
_cell_length_c   8.325
_cell_angle_alpha   106.217
_cell_angle_beta   91.591
_cell_angle_gamma   107.104
_symmetry_Int_Tables_number   1
_cell_volume   515.785
_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  0.265  0.937  0.586  1.0
  V  V1  1  0.735  0.063  0.414  1.0
  V  V2  1  0.081  0.439  0.190  1.0
  V  V3  1  0.919  0.561  0.810  1.0
  V  V4  1  0.566  0.756  0.907  1.0
  V  V5  1  0.434  0.244  0.093  1.0
  Cu  Cu6  1  0.132  0.256  0.789  1.0
  Cu  Cu7  1  0.855  0.853  0.630  1.0
  Cu  Cu8  1  0.145  0.147  0.370  1.0
  Cu  Cu9  1  0.868  0.744  0.211  1.0
  Cu  Cu10  1  0.277  0.511  0.578  1.0
  Cu  Cu11  1  0.723  0.489  0.422  1.0
  Cu  Cu12  1  0.499  0.338  0.708  1.0
  Cu  Cu13  1  0.501  0.662  0.292  1.0
  Cu  Cu14  1  0.718  0.143  0.836  1.0
  Cu  Cu15  1  0.282  0.857  0.164  1.0
  Cu  Cu16  1  0.000  0.000  0.000  1.0
  O  O17  1  0.392  0.822  0.963  1.0
  O  O18  1  0.608  0.178  0.037  1.0
  O  O19  1  0.717  0.264  0.428  1.0
  O  O20  1  0.283  0.736  0.572  1.0
  O  O21  1  0.533  0.907  0.334  1.0
  O  O22  1  0.467  0.093  0.666  1.0
  O  O23  1  0.734  0.719  0.403  1.0
  O  O24  1  0.266  0.281  0.597  1.0
  O  O25  1  0.241  0.072  0.123  1.0
  O  O26  1  0.759  0.928  0.877  1.0
  O  O27  1  0.113  0.995  0.722  1.0
  O  O28  1  0.887  0.005  0.278  1.0
  O  O29  1  0.184  0.929  0.376  1.0
  O  O30  1  0.816  0.071  0.624  1.0
  O  O31  1  0.372  0.323  0.945  1.0
  O  O32  1  0.628  0.677  0.055  1.0
  O  O33  1  0.027  0.248  0.004  1.0
  O  O34  1  0.498  0.426  0.286  1.0
  O  O35  1  0.502  0.574  0.714  1.0
  O  O36  1  0.913  0.525  0.212  1.0
  O  O37  1  0.087  0.475  0.788  1.0
  O  O38  1  0.973  0.752  0.996  1.0
  O  O39  1  0.116  0.370  0.367  1.0
  O  O40  1  0.266  0.613  0.186  1.0
  O  O41  1  0.734  0.387  0.814  1.0
  O  O42  1  0.884  0.630  0.633  1.0
[/CIF]
.