The material structure described by La2Cu2O5 crystallizes in the triclinic P-1 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(5), two equivalent O(7), and three equivalent O(6) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), one O(8), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), and three equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded to one O(1), one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form distorted corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third Cu site, Cu(3) is bonded in a rectangular see-saw-like geometry to one O(2), one O(8), and two equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one La(3), two equivalent La(1), two equivalent La(2), and one Cu(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one La(2), one La(3), one Cu(3), and three equivalent Cu(1) atoms. In the third O site, O(3) is bonded to two equivalent La(2), one Cu(1), and two equivalent Cu(3) atoms to form distorted OLa2Cu3 trigonal bipyramids that share corners with two equivalent O(4)La4Cu2 octahedra, corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids,  an edgeedge with one O(3)La2Cu3 trigonal bipyramid, and  a faceface with one O(4)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the fourth O site, O(4) is bonded to two equivalent La(2), two equivalent La(3), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(7)La4Cu2 octahedra, corners with two equivalent O(6)La5Cu octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, edges with two equivalent O(4)La4Cu2 octahedra,  a faceface with one O(6)La5Cu octahedra, faces with two equivalent O(5)La4Cu2 octahedra, and  a faceface with one O(3)La2Cu3 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 2-50°. In the fifth O site, O(5) is bonded to one La(2), one La(3), two equivalent La(1), and two equivalent Cu(2) atoms to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with four equivalent O(6)La5Cu octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids,  an edgeedge with one O(5)La4Cu2 octahedra, faces with two equivalent O(4)La4Cu2 octahedra, faces with two equivalent O(7)La4Cu2 octahedra, and faces with two equivalent O(6)La5Cu octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the sixth O site, O(6) is bonded to two equivalent La(3), three equivalent La(1), and one Cu(2) atom to form distorted OLa5Cu octahedra that share corners with two equivalent O(4)La4Cu2 octahedra, corners with four equivalent O(5)La4Cu2 octahedra, corners with four equivalent O(7)La4Cu2 octahedra, edges with four equivalent O(6)La5Cu octahedra,  a faceface with one O(4)La4Cu2 octahedra,  a faceface with one O(7)La4Cu2 octahedra, and faces with two equivalent O(5)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the seventh O site, O(7) is bonded to four equivalent La(1) and two equivalent Cu(2) atoms to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(4)La4Cu2 octahedra, corners with eight equivalent O(6)La5Cu octahedra, edges with two equivalent O(7)La4Cu2 octahedra, faces with two equivalent O(6)La5Cu octahedra, and faces with four equivalent O(5)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 2-50°. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(3), and one Cu(3) atom. is represented by the CIF file [CIF]
data_La2Cu2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.768
_cell_length_b   7.217
_cell_length_c   13.908
_cell_angle_alpha   100.506
_cell_angle_beta   96.844
_cell_angle_gamma   104.999
_symmetry_Int_Tables_number   1
_cell_volume   353.630
_cell_formula_units_Z   3
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  0.859  0.224  0.463  1.0
  La  La1  1  0.287  0.750  0.805  1.0
  La  La2  1  0.925  0.192  0.731  1.0
  La  La3  1  0.713  0.250  0.195  1.0
  La  La4  1  0.075  0.808  0.269  1.0
  La  La5  1  0.141  0.776  0.537  1.0
  Cu  Cu6  1  0.297  0.524  0.079  1.0
  Cu  Cu7  1  0.446  0.514  0.362  1.0
  Cu  Cu8  1  0.835  0.869  0.058  1.0
  Cu  Cu9  1  0.554  0.486  0.638  1.0
  Cu  Cu10  1  0.165  0.131  0.942  1.0
  Cu  Cu11  1  0.703  0.476  0.921  1.0
  O  O12  1  0.279  0.156  0.325  1.0
  O  O13  1  0.176  0.413  0.929  1.0
  O  O14  1  0.908  0.841  0.922  1.0
  O  O15  1  0.377  0.524  0.221  1.0
  O  O16  1  0.947  0.516  0.362  1.0
  O  O17  1  0.331  0.124  0.583  1.0
  O  O18  1  0.500  0.500  0.500  1.0
  O  O19  1  0.596  0.908  0.175  1.0
  O  O20  1  0.053  0.484  0.638  1.0
  O  O21  1  0.404  0.092  0.825  1.0
  O  O22  1  0.623  0.476  0.779  1.0
  O  O23  1  0.669  0.876  0.417  1.0
  O  O24  1  0.092  0.159  0.078  1.0
  O  O25  1  0.824  0.587  0.071  1.0
  O  O26  1  0.721  0.844  0.675  1.0
[/CIF]
.
The material structure described by La2Cu2O5 crystallizes in the triclinic P-1 space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(5), two equivalent O(7), and three equivalent O(6) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(2), one O(5), one O(8), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(4), two equivalent O(6), and two equivalent O(8) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), and three equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded to one O(1), one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form distorted corner-sharing CuO6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the third Cu site, Cu(3) is bonded in a rectangular see-saw-like geometry to one O(2), one O(8), and two equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one La(3), two equivalent La(1), two equivalent La(2), and one Cu(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one La(2), one La(3), one Cu(3), and three equivalent Cu(1) atoms. In the third O site, O(3) is bonded to two equivalent La(2), one Cu(1), and two equivalent Cu(3) atoms to form distorted OLa2Cu3 trigonal bipyramids that share corners with two equivalent O(4)La4Cu2 octahedra, corners with two equivalent O(5)La4Cu2 octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids,  an edgeedge with one O(3)La2Cu3 trigonal bipyramid, and  a faceface with one O(4)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the fourth O site, O(4) is bonded to two equivalent La(2), two equivalent La(3), one Cu(1), and one Cu(2) atom to form distorted OLa4Cu2 octahedra that share  a cornercorner with one O(7)La4Cu2 octahedra, corners with two equivalent O(6)La5Cu octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids, edges with two equivalent O(4)La4Cu2 octahedra,  a faceface with one O(6)La5Cu octahedra, faces with two equivalent O(5)La4Cu2 octahedra, and  a faceface with one O(3)La2Cu3 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 2-50°. In the fifth O site, O(5) is bonded to one La(2), one La(3), two equivalent La(1), and two equivalent Cu(2) atoms to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(5)La4Cu2 octahedra, corners with four equivalent O(6)La5Cu octahedra, corners with two equivalent O(3)La2Cu3 trigonal bipyramids,  an edgeedge with one O(5)La4Cu2 octahedra, faces with two equivalent O(4)La4Cu2 octahedra, faces with two equivalent O(7)La4Cu2 octahedra, and faces with two equivalent O(6)La5Cu octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the sixth O site, O(6) is bonded to two equivalent La(3), three equivalent La(1), and one Cu(2) atom to form distorted OLa5Cu octahedra that share corners with two equivalent O(4)La4Cu2 octahedra, corners with four equivalent O(5)La4Cu2 octahedra, corners with four equivalent O(7)La4Cu2 octahedra, edges with four equivalent O(6)La5Cu octahedra,  a faceface with one O(4)La4Cu2 octahedra,  a faceface with one O(7)La4Cu2 octahedra, and faces with two equivalent O(5)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the seventh O site, O(7) is bonded to four equivalent La(1) and two equivalent Cu(2) atoms to form distorted OLa4Cu2 octahedra that share corners with two equivalent O(4)La4Cu2 octahedra, corners with eight equivalent O(6)La5Cu octahedra, edges with two equivalent O(7)La4Cu2 octahedra, faces with two equivalent O(6)La5Cu octahedra, and faces with four equivalent O(5)La4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 2-50°. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one La(2), two equivalent La(3), and one Cu(3) atom. is represented by the CIF file [CIF]
data_La2Cu2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.768
_cell_length_b   7.217
_cell_length_c   13.908
_cell_angle_alpha   100.506
_cell_angle_beta   96.844
_cell_angle_gamma   104.999
_symmetry_Int_Tables_number   1
_cell_volume   353.630
_cell_formula_units_Z   3
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  0.859  0.224  0.463  1.0
  La  La1  1  0.287  0.750  0.805  1.0
  La  La2  1  0.925  0.192  0.731  1.0
  La  La3  1  0.713  0.250  0.195  1.0
  La  La4  1  0.075  0.808  0.269  1.0
  La  La5  1  0.141  0.776  0.537  1.0
  Cu  Cu6  1  0.297  0.524  0.079  1.0
  Cu  Cu7  1  0.446  0.514  0.362  1.0
  Cu  Cu8  1  0.835  0.869  0.058  1.0
  Cu  Cu9  1  0.554  0.486  0.638  1.0
  Cu  Cu10  1  0.165  0.131  0.942  1.0
  Cu  Cu11  1  0.703  0.476  0.921  1.0
  O  O12  1  0.279  0.156  0.325  1.0
  O  O13  1  0.176  0.413  0.929  1.0
  O  O14  1  0.908  0.841  0.922  1.0
  O  O15  1  0.377  0.524  0.221  1.0
  O  O16  1  0.947  0.516  0.362  1.0
  O  O17  1  0.331  0.124  0.583  1.0
  O  O18  1  0.500  0.500  0.500  1.0
  O  O19  1  0.596  0.908  0.175  1.0
  O  O20  1  0.053  0.484  0.638  1.0
  O  O21  1  0.404  0.092  0.825  1.0
  O  O22  1  0.623  0.476  0.779  1.0
  O  O23  1  0.669  0.876  0.417  1.0
  O  O24  1  0.092  0.159  0.078  1.0
  O  O25  1  0.824  0.587  0.071  1.0
  O  O26  1  0.721  0.844  0.675  1.0
[/CIF]
.