The material described by La12Cu10O31 crystallizes in the monoclinic C2 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to one O(11), one O(16), one O(17), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to one O(1), one O(10), one O(12), one O(15), one O(3), one O(4), one O(7), and one O(8) atom. In the third La site, La(3) is bonded in a distorted octahedral geometry to one O(11), one O(16), one O(17), one O(5), one O(6), and one O(9) atom. In the fourth La site, La(4) is bonded in a distorted octahedral geometry to one O(10), one O(12), one O(15), one O(3), one O(4), and one O(8) atom. In the fifth La site, La(5) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(14), one O(16), one O(17), one O(5), one O(6), and one O(9) atom. In the sixth La site, La(6) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(14), one O(15), one O(3), one O(4), and one O(8) atom. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(14), one O(6), one O(7), and one O(8) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(14), one O(3), one O(7), and one O(9) atom. In the third Cu site, Cu(3) is bonded in a rectangular see-saw-like geometry to one O(11), one O(13), one O(2), and one O(5) atom. In the fourth Cu site, Cu(4) is bonded in a T-shaped geometry to one O(1) and two equivalent O(15) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(13), one O(2), and two equivalent O(17) atoms. In the sixth Cu site, Cu(6) is bonded in a rectangular see-saw-like geometry to one O(12), one O(14), one O(16), and one O(7) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to two equivalent La(2) and one Cu(4) atom. In the second O site, O(2) is bonded to two equivalent La(1), one Cu(5), and two equivalent Cu(3) atoms to form distorted corner-sharing OLa2Cu3 trigonal bipyramids. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one La(2), one La(4), one La(6), and one Cu(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one La(2), one La(4), and one La(6) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(1) atom. In the seventh O site, O(7) is bonded to one La(1), one La(2), one Cu(1), one Cu(2), and one Cu(6) atom to form distorted OLa2Cu3 trigonal bipyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(2)La2Cu3 trigonal bipyramid, corners with three equivalent O(14)La2Cu3 trigonal bipyramids, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the eighth O site, O(8) is bonded to one La(2), one La(4), one La(6), and one Cu(1) atom to form distorted OLa3Cu trigonal pyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  an edgeedge with one O(15)La3Cu tetrahedra,  an edgeedge with one O(14)La2Cu3 trigonal bipyramid, and  an edgeedge with one O(7)La2Cu3 trigonal bipyramid. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one La(2), one La(4), and one La(6) atom. In the eleventh O site, O(11) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one La(2), one La(4), one La(6), and one Cu(6) atom. In the thirteenth O site, O(13) is bonded to two equivalent La(5), one Cu(5), and two equivalent Cu(3) atoms to form distorted corner-sharing OLa2Cu3 trigonal bipyramids. In the fourteenth O site, O(14) is bonded to one La(5), one La(6), one Cu(1), one Cu(2), and one Cu(6) atom to form distorted OLa2Cu3 trigonal bipyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(13)La2Cu3 trigonal bipyramid, corners with three equivalent O(7)La2Cu3 trigonal bipyramids, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the fifteenth O site, O(15) is bonded to one La(2), one La(4), one La(6), and one Cu(4) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(14)La2Cu3 trigonal bipyramid,  a cornercorner with one O(7)La2Cu3 trigonal bipyramid,  a cornercorner with one O(8)La3Cu trigonal pyramid, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(6) atom. In the seventeenth O site, O(17) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_La12Cu10O31
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.708
_cell_length_b   6.708
_cell_length_c   20.684
_cell_angle_alpha   89.942
_cell_angle_beta   89.942
_cell_angle_gamma   120.346
_symmetry_Int_Tables_number   1
_cell_volume   803.150
_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
  La  La0  1  1.000  1.000  0.129  1.0
  La  La1  1  0.986  0.000  0.386  1.0
  La  La2  1  1.000  0.014  0.614  1.0
  La  La3  1  0.000  0.000  0.871  1.0
  La  La4  1  0.666  0.333  0.130  1.0
  La  La5  1  0.665  0.329  0.617  1.0
  La  La6  1  0.671  0.335  0.383  1.0
  La  La7  1  0.667  0.334  0.870  1.0
  La  La8  1  0.333  0.667  0.871  1.0
  La  La9  1  0.333  0.650  0.383  1.0
  La  La10  1  0.350  0.667  0.617  1.0
  La  La11  1  0.333  0.667  0.129  1.0
  Cu  Cu12  1  0.159  0.330  0.256  1.0
  Cu  Cu13  1  0.171  0.335  0.744  1.0
  Cu  Cu14  1  0.166  0.333  0.000  1.0
  Cu  Cu15  1  0.665  0.829  0.256  1.0
  Cu  Cu16  1  0.667  0.834  1.000  1.0
  Cu  Cu17  1  0.670  0.841  0.744  1.0
  Cu  Cu18  1  0.161  0.839  0.500  1.0
  Cu  Cu19  1  0.166  0.834  0.000  1.0
  Cu  Cu20  1  0.171  0.840  0.256  1.0
  Cu  Cu21  1  0.160  0.829  0.744  1.0
  O  O22  1  0.007  0.993  0.500  1.0
  O  O23  1  0.001  0.999  0.000  1.0
  O  O24  1  0.667  0.000  0.328  1.0
  O  O25  1  0.648  0.006  0.574  1.0
  O  O26  1  0.669  0.002  0.076  1.0
  O  O27  1  0.995  0.332  0.180  1.0
  O  O28  1  0.998  0.999  0.254  1.0
  O  O29  1  0.001  0.002  0.746  1.0
  O  O30  1  0.325  0.324  0.327  1.0
  O  O31  1  0.339  0.337  0.820  1.0
  O  O32  1  0.357  0.343  0.578  1.0
  O  O33  1  0.334  0.335  0.076  1.0
  O  O34  1  0.005  0.676  0.328  1.0
  O  O35  1  0.994  0.352  0.426  1.0
  O  O36  1  0.998  0.331  0.924  1.0
  O  O37  1  1.000  0.333  0.672  1.0
  O  O38  1  0.663  0.661  0.180  1.0
  O  O39  1  0.676  0.675  0.673  1.0
  O  O40  1  0.657  0.643  0.422  1.0
  O  O41  1  0.665  0.666  0.924  1.0
  O  O42  1  0.332  0.668  0.000  1.0
  O  O43  1  0.331  0.666  0.256  1.0
  O  O44  1  0.334  0.669  0.744  1.0
  O  O45  1  0.668  0.005  0.820  1.0
  O  O46  1  0.013  0.660  0.568  1.0
  O  O47  1  0.996  0.662  0.820  1.0
  O  O48  1  1.000  0.667  0.077  1.0
  O  O49  1  0.338  0.004  0.180  1.0
  O  O50  1  0.324  0.995  0.672  1.0
  O  O51  1  0.340  0.987  0.432  1.0
  O  O52  1  0.333  0.000  0.923  1.0
[/CIF]
.
The material described by La12Cu10O31 crystallizes in the monoclinic C2 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a body-centered cubic geometry to one O(11), one O(16), one O(17), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to one O(1), one O(10), one O(12), one O(15), one O(3), one O(4), one O(7), and one O(8) atom. In the third La site, La(3) is bonded in a distorted octahedral geometry to one O(11), one O(16), one O(17), one O(5), one O(6), and one O(9) atom. In the fourth La site, La(4) is bonded in a distorted octahedral geometry to one O(10), one O(12), one O(15), one O(3), one O(4), and one O(8) atom. In the fifth La site, La(5) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(14), one O(16), one O(17), one O(5), one O(6), and one O(9) atom. In the sixth La site, La(6) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(14), one O(15), one O(3), one O(4), and one O(8) atom. There are six inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(14), one O(6), one O(7), and one O(8) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(14), one O(3), one O(7), and one O(9) atom. In the third Cu site, Cu(3) is bonded in a rectangular see-saw-like geometry to one O(11), one O(13), one O(2), and one O(5) atom. In the fourth Cu site, Cu(4) is bonded in a T-shaped geometry to one O(1) and two equivalent O(15) atoms. In the fifth Cu site, Cu(5) is bonded in a square co-planar geometry to one O(13), one O(2), and two equivalent O(17) atoms. In the sixth Cu site, Cu(6) is bonded in a rectangular see-saw-like geometry to one O(12), one O(14), one O(16), and one O(7) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a T-shaped geometry to two equivalent La(2) and one Cu(4) atom. In the second O site, O(2) is bonded to two equivalent La(1), one Cu(5), and two equivalent Cu(3) atoms to form distorted corner-sharing OLa2Cu3 trigonal bipyramids. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one La(2), one La(4), one La(6), and one Cu(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one La(2), one La(4), and one La(6) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(1) atom. In the seventh O site, O(7) is bonded to one La(1), one La(2), one Cu(1), one Cu(2), and one Cu(6) atom to form distorted OLa2Cu3 trigonal bipyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(2)La2Cu3 trigonal bipyramid, corners with three equivalent O(14)La2Cu3 trigonal bipyramids, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the eighth O site, O(8) is bonded to one La(2), one La(4), one La(6), and one Cu(1) atom to form distorted OLa3Cu trigonal pyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  an edgeedge with one O(15)La3Cu tetrahedra,  an edgeedge with one O(14)La2Cu3 trigonal bipyramid, and  an edgeedge with one O(7)La2Cu3 trigonal bipyramid. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(2) atom. In the tenth O site, O(10) is bonded in a trigonal non-coplanar geometry to one La(2), one La(4), and one La(6) atom. In the eleventh O site, O(11) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one La(2), one La(4), one La(6), and one Cu(6) atom. In the thirteenth O site, O(13) is bonded to two equivalent La(5), one Cu(5), and two equivalent Cu(3) atoms to form distorted corner-sharing OLa2Cu3 trigonal bipyramids. In the fourteenth O site, O(14) is bonded to one La(5), one La(6), one Cu(1), one Cu(2), and one Cu(6) atom to form distorted OLa2Cu3 trigonal bipyramids that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(13)La2Cu3 trigonal bipyramid, corners with three equivalent O(7)La2Cu3 trigonal bipyramids, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the fifteenth O site, O(15) is bonded to one La(2), one La(4), one La(6), and one Cu(4) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(15)La3Cu tetrahedra,  a cornercorner with one O(14)La2Cu3 trigonal bipyramid,  a cornercorner with one O(7)La2Cu3 trigonal bipyramid,  a cornercorner with one O(8)La3Cu trigonal pyramid, and  an edgeedge with one O(8)La3Cu trigonal pyramid. In the sixteenth O site, O(16) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(6) atom. In the seventeenth O site, O(17) is bonded in a distorted see-saw-like geometry to one La(1), one La(3), one La(5), and one Cu(5) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_La12Cu10O31
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.708
_cell_length_b   6.708
_cell_length_c   20.684
_cell_angle_alpha   89.942
_cell_angle_beta   89.942
_cell_angle_gamma   120.346
_symmetry_Int_Tables_number   1
_cell_volume   803.150
_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
  La  La0  1  1.000  1.000  0.129  1.0
  La  La1  1  0.986  0.000  0.386  1.0
  La  La2  1  1.000  0.014  0.614  1.0
  La  La3  1  0.000  0.000  0.871  1.0
  La  La4  1  0.666  0.333  0.130  1.0
  La  La5  1  0.665  0.329  0.617  1.0
  La  La6  1  0.671  0.335  0.383  1.0
  La  La7  1  0.667  0.334  0.870  1.0
  La  La8  1  0.333  0.667  0.871  1.0
  La  La9  1  0.333  0.650  0.383  1.0
  La  La10  1  0.350  0.667  0.617  1.0
  La  La11  1  0.333  0.667  0.129  1.0
  Cu  Cu12  1  0.159  0.330  0.256  1.0
  Cu  Cu13  1  0.171  0.335  0.744  1.0
  Cu  Cu14  1  0.166  0.333  0.000  1.0
  Cu  Cu15  1  0.665  0.829  0.256  1.0
  Cu  Cu16  1  0.667  0.834  1.000  1.0
  Cu  Cu17  1  0.670  0.841  0.744  1.0
  Cu  Cu18  1  0.161  0.839  0.500  1.0
  Cu  Cu19  1  0.166  0.834  0.000  1.0
  Cu  Cu20  1  0.171  0.840  0.256  1.0
  Cu  Cu21  1  0.160  0.829  0.744  1.0
  O  O22  1  0.007  0.993  0.500  1.0
  O  O23  1  0.001  0.999  0.000  1.0
  O  O24  1  0.667  0.000  0.328  1.0
  O  O25  1  0.648  0.006  0.574  1.0
  O  O26  1  0.669  0.002  0.076  1.0
  O  O27  1  0.995  0.332  0.180  1.0
  O  O28  1  0.998  0.999  0.254  1.0
  O  O29  1  0.001  0.002  0.746  1.0
  O  O30  1  0.325  0.324  0.327  1.0
  O  O31  1  0.339  0.337  0.820  1.0
  O  O32  1  0.357  0.343  0.578  1.0
  O  O33  1  0.334  0.335  0.076  1.0
  O  O34  1  0.005  0.676  0.328  1.0
  O  O35  1  0.994  0.352  0.426  1.0
  O  O36  1  0.998  0.331  0.924  1.0
  O  O37  1  1.000  0.333  0.672  1.0
  O  O38  1  0.663  0.661  0.180  1.0
  O  O39  1  0.676  0.675  0.673  1.0
  O  O40  1  0.657  0.643  0.422  1.0
  O  O41  1  0.665  0.666  0.924  1.0
  O  O42  1  0.332  0.668  0.000  1.0
  O  O43  1  0.331  0.666  0.256  1.0
  O  O44  1  0.334  0.669  0.744  1.0
  O  O45  1  0.668  0.005  0.820  1.0
  O  O46  1  0.013  0.660  0.568  1.0
  O  O47  1  0.996  0.662  0.820  1.0
  O  O48  1  1.000  0.667  0.077  1.0
  O  O49  1  0.338  0.004  0.180  1.0
  O  O50  1  0.324  0.995  0.672  1.0
  O  O51  1  0.340  0.987  0.432  1.0
  O  O52  1  0.333  0.000  0.923  1.0
[/CIF]
.