The compound described by La6Cu6O17 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(6), two equivalent O(1), and two equivalent O(7) atoms. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to one O(2), one O(3), one O(4), one O(6), two equivalent O(1), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to one O(4), one O(5), and two equivalent O(7) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(4) and two equivalent O(6) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are seven inequivalent O sites. In the first O site, O(7) is bonded to one La(1), two equivalent La(2), and one Cu(1) atom to form OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra, corners with three equivalent O(6)La3Cu tetrahedra, corners with four equivalent O(7)La3Cu tetrahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, corners with two equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(2)La3Cu tetrahedra, and edges with two equivalent O(1)La3Cu trigonal pyramids. In the second O site, O(1) is bonded to one La(1), two equivalent La(2), and one Cu(4) atom to form distorted OLa3Cu trigonal pyramids that share  a cornercorner with one O(6)La3Cu tetrahedra, corners with two equivalent O(7)La3Cu tetrahedra, corners with three equivalent O(2)La3Cu tetrahedra, corners with four equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(6)La3Cu tetrahedra, edges with two equivalent O(7)La3Cu tetrahedra, and edges with two equivalent O(3)La2Cu3 trigonal bipyramids. In the third O site, O(2) is bonded to one La(1), two equivalent La(2), and one Cu(2) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra,  a cornercorner with one O(6)La3Cu tetrahedra, corners with two equivalent O(7)La3Cu tetrahedra, corners with six equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(6)La3Cu tetrahedra, edges with two equivalent O(7)La3Cu tetrahedra, and edges with two equivalent O(3)La2Cu3 trigonal bipyramids. In the fourth O site, O(3) is bonded to two equivalent La(2), one Cu(2), and two equivalent Cu(4) atoms to form distorted OLa2Cu3 trigonal bipyramids that share corners with two equivalent O(6)La3Cu tetrahedra, corners with four equivalent O(7)La3Cu tetrahedra, corners with three equivalent O(3)La2Cu3 trigonal bipyramids, edges with two equivalent O(2)La3Cu tetrahedra, and edges with four equivalent O(1)La3Cu trigonal pyramids. In the fifth O site, O(4) is bonded in a square co-planar geometry to two equivalent La(2), one Cu(1), and one Cu(3) atom. In the sixth O site, O(5) is bonded in a distorted square co-planar geometry to two equivalent La(1) and two equivalent Cu(1) atoms. In the seventh O site, O(6) is bonded to one La(1), two equivalent La(2), and one Cu(3) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra,  a cornercorner with one O(6)La3Cu tetrahedra, corners with six equivalent O(7)La3Cu tetrahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, corners with two equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(2)La3Cu tetrahedra, and edges with two equivalent O(1)La3Cu trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_La6Cu6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.773
_cell_length_b   6.773
_cell_length_c   10.525
_cell_angle_alpha   86.927
_cell_angle_beta   86.927
_cell_angle_gamma   120.305
_symmetry_Int_Tables_number   1
_cell_volume   414.406
_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  0.475  0.475  0.242  1.0
  La  La1  1  0.862  0.195  0.740  1.0
  La  La2  1  0.805  0.138  0.260  1.0
  La  La3  1  0.525  0.525  0.758  1.0
  La  La4  1  0.195  0.862  0.740  1.0
  La  La5  1  0.138  0.805  0.260  1.0
  Cu  Cu6  1  0.337  0.663  0.500  1.0
  Cu  Cu7  1  0.663  0.337  0.500  1.0
  Cu  Cu8  1  0.000  0.000  0.000  1.0
  Cu  Cu9  1  0.000  0.000  0.500  1.0
  Cu  Cu10  1  0.000  0.500  0.000  1.0
  Cu  Cu11  1  0.500  0.000  0.000  1.0
  O  O12  1  0.146  0.485  0.143  1.0
  O  O13  1  0.174  0.174  0.851  1.0
  O  O14  1  0.515  0.854  0.857  1.0
  O  O15  1  0.834  0.166  0.000  1.0
  O  O16  1  0.831  0.169  0.500  1.0
  O  O17  1  0.500  0.500  0.500  1.0
  O  O18  1  0.826  0.826  0.149  1.0
  O  O19  1  0.867  0.867  0.663  1.0
  O  O20  1  0.485  0.146  0.143  1.0
  O  O21  1  0.133  0.133  0.337  1.0
  O  O22  1  0.854  0.515  0.857  1.0
  O  O23  1  0.780  0.455  0.333  1.0
  O  O24  1  0.169  0.831  0.500  1.0
  O  O25  1  0.166  0.834  0.000  1.0
  O  O26  1  0.220  0.545  0.667  1.0
  O  O27  1  0.545  0.220  0.667  1.0
  O  O28  1  0.455  0.780  0.333  1.0
[/CIF]
.
The compound described by La6Cu6O17 crystallizes in the monoclinic C2/m space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(2), one O(5), one O(6), two equivalent O(1), and two equivalent O(7) atoms. In the second La site, La(2) is bonded in a distorted body-centered cubic geometry to one O(2), one O(3), one O(4), one O(6), two equivalent O(1), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to one O(4), one O(5), and two equivalent O(7) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(4) and two equivalent O(6) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are seven inequivalent O sites. In the first O site, O(7) is bonded to one La(1), two equivalent La(2), and one Cu(1) atom to form OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra, corners with three equivalent O(6)La3Cu tetrahedra, corners with four equivalent O(7)La3Cu tetrahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, corners with two equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(2)La3Cu tetrahedra, and edges with two equivalent O(1)La3Cu trigonal pyramids. In the second O site, O(1) is bonded to one La(1), two equivalent La(2), and one Cu(4) atom to form distorted OLa3Cu trigonal pyramids that share  a cornercorner with one O(6)La3Cu tetrahedra, corners with two equivalent O(7)La3Cu tetrahedra, corners with three equivalent O(2)La3Cu tetrahedra, corners with four equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(6)La3Cu tetrahedra, edges with two equivalent O(7)La3Cu tetrahedra, and edges with two equivalent O(3)La2Cu3 trigonal bipyramids. In the third O site, O(2) is bonded to one La(1), two equivalent La(2), and one Cu(2) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra,  a cornercorner with one O(6)La3Cu tetrahedra, corners with two equivalent O(7)La3Cu tetrahedra, corners with six equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(6)La3Cu tetrahedra, edges with two equivalent O(7)La3Cu tetrahedra, and edges with two equivalent O(3)La2Cu3 trigonal bipyramids. In the fourth O site, O(3) is bonded to two equivalent La(2), one Cu(2), and two equivalent Cu(4) atoms to form distorted OLa2Cu3 trigonal bipyramids that share corners with two equivalent O(6)La3Cu tetrahedra, corners with four equivalent O(7)La3Cu tetrahedra, corners with three equivalent O(3)La2Cu3 trigonal bipyramids, edges with two equivalent O(2)La3Cu tetrahedra, and edges with four equivalent O(1)La3Cu trigonal pyramids. In the fifth O site, O(4) is bonded in a square co-planar geometry to two equivalent La(2), one Cu(1), and one Cu(3) atom. In the sixth O site, O(5) is bonded in a distorted square co-planar geometry to two equivalent La(1) and two equivalent Cu(1) atoms. In the seventh O site, O(6) is bonded to one La(1), two equivalent La(2), and one Cu(3) atom to form distorted OLa3Cu tetrahedra that share  a cornercorner with one O(2)La3Cu tetrahedra,  a cornercorner with one O(6)La3Cu tetrahedra, corners with six equivalent O(7)La3Cu tetrahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, corners with two equivalent O(1)La3Cu trigonal pyramids,  an edgeedge with one O(2)La3Cu tetrahedra, and edges with two equivalent O(1)La3Cu trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_La6Cu6O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.773
_cell_length_b   6.773
_cell_length_c   10.525
_cell_angle_alpha   86.927
_cell_angle_beta   86.927
_cell_angle_gamma   120.305
_symmetry_Int_Tables_number   1
_cell_volume   414.406
_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  0.475  0.475  0.242  1.0
  La  La1  1  0.862  0.195  0.740  1.0
  La  La2  1  0.805  0.138  0.260  1.0
  La  La3  1  0.525  0.525  0.758  1.0
  La  La4  1  0.195  0.862  0.740  1.0
  La  La5  1  0.138  0.805  0.260  1.0
  Cu  Cu6  1  0.337  0.663  0.500  1.0
  Cu  Cu7  1  0.663  0.337  0.500  1.0
  Cu  Cu8  1  0.000  0.000  0.000  1.0
  Cu  Cu9  1  0.000  0.000  0.500  1.0
  Cu  Cu10  1  0.000  0.500  0.000  1.0
  Cu  Cu11  1  0.500  0.000  0.000  1.0
  O  O12  1  0.146  0.485  0.143  1.0
  O  O13  1  0.174  0.174  0.851  1.0
  O  O14  1  0.515  0.854  0.857  1.0
  O  O15  1  0.834  0.166  0.000  1.0
  O  O16  1  0.831  0.169  0.500  1.0
  O  O17  1  0.500  0.500  0.500  1.0
  O  O18  1  0.826  0.826  0.149  1.0
  O  O19  1  0.867  0.867  0.663  1.0
  O  O20  1  0.485  0.146  0.143  1.0
  O  O21  1  0.133  0.133  0.337  1.0
  O  O22  1  0.854  0.515  0.857  1.0
  O  O23  1  0.780  0.455  0.333  1.0
  O  O24  1  0.169  0.831  0.500  1.0
  O  O25  1  0.166  0.834  0.000  1.0
  O  O26  1  0.220  0.545  0.667  1.0
  O  O27  1  0.545  0.220  0.667  1.0
  O  O28  1  0.455  0.780  0.333  1.0
[/CIF]
.