The crystal structure described by Cu2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO5 trigonal bipyramids that share corners with four equivalent Cu(2)O6 octahedra,  a cornercorner with one O(1)Cu3O tetrahedra, edges with three equivalent Cu(2)O6 octahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-72°. In the second Cu site, Cu(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO6 octahedra that share corners with six equivalent Cu(2)O6 octahedra, corners with two equivalent O(1)Cu3O tetrahedra, corners with four equivalent Cu(1)O5 trigonal bipyramids, and edges with three equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Cu(1), two equivalent Cu(2), and one O(1) atom to form distorted OCu3O tetrahedra that share corners with two equivalent Cu(2)O6 octahedra, corners with two equivalent O(1)Cu3O tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid, corners with four equivalent O(2)Cu4 trigonal pyramids, corners with six equivalent O(3)Cu4 trigonal pyramids, and  an edgeedge with one O(2)Cu4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 70-75°. In the second O site, O(2) is bonded to two equivalent Cu(1) and two equivalent Cu(2) atoms to form distorted OCu4 trigonal pyramids that share corners with four equivalent O(1)Cu3O tetrahedra, corners with two equivalent O(2)Cu4 trigonal pyramids, corners with four equivalent O(3)Cu4 trigonal pyramids,  an edgeedge with one O(1)Cu3O tetrahedra,  an edgeedge with one O(2)Cu4 trigonal pyramid, and edges with two equivalent O(3)Cu4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Cu(1) and two equivalent Cu(2) atoms to form OCu4 trigonal pyramids that share corners with six equivalent O(1)Cu3O tetrahedra, corners with two equivalent O(3)Cu4 trigonal pyramids, corners with four equivalent O(2)Cu4 trigonal pyramids,  an edgeedge with one O(3)Cu4 trigonal pyramid, and edges with two equivalent O(2)Cu4 trigonal pyramids. is represented by the CIF card [CIF]
data_Cu2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.103
_cell_length_b   5.344
_cell_length_c   7.242
_cell_angle_alpha   52.701
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   218.653
_cell_formula_units_Z   4
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
  Cu  Cu0  1  0.013  0.121  0.137  1.0
  Cu  Cu1  1  0.487  0.121  0.637  1.0
  Cu  Cu2  1  0.256  0.507  0.236  1.0
  Cu  Cu3  1  0.756  0.493  0.264  1.0
  Cu  Cu4  1  0.244  0.507  0.736  1.0
  Cu  Cu5  1  0.744  0.493  0.764  1.0
  Cu  Cu6  1  0.513  0.879  0.363  1.0
  Cu  Cu7  1  0.987  0.879  0.863  1.0
  O  O8  1  0.077  0.997  0.441  1.0
  O  O9  1  0.819  0.488  0.016  1.0
  O  O10  1  0.423  0.997  0.941  1.0
  O  O11  1  0.506  0.281  0.312  1.0
  O  O12  1  0.006  0.719  0.188  1.0
  O  O13  1  0.681  0.488  0.516  1.0
  O  O14  1  0.319  0.512  0.484  1.0
  O  O15  1  0.994  0.281  0.812  1.0
  O  O16  1  0.494  0.719  0.688  1.0
  O  O17  1  0.577  0.003  0.059  1.0
  O  O18  1  0.181  0.512  0.984  1.0
  O  O19  1  0.923  0.003  0.559  1.0
[/CIF]
.
The crystal structure described by Cu2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO5 trigonal bipyramids that share corners with four equivalent Cu(2)O6 octahedra,  a cornercorner with one O(1)Cu3O tetrahedra, edges with three equivalent Cu(2)O6 octahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 57-72°. In the second Cu site, Cu(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO6 octahedra that share corners with six equivalent Cu(2)O6 octahedra, corners with two equivalent O(1)Cu3O tetrahedra, corners with four equivalent Cu(1)O5 trigonal bipyramids, and edges with three equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-62°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Cu(1), two equivalent Cu(2), and one O(1) atom to form distorted OCu3O tetrahedra that share corners with two equivalent Cu(2)O6 octahedra, corners with two equivalent O(1)Cu3O tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid, corners with four equivalent O(2)Cu4 trigonal pyramids, corners with six equivalent O(3)Cu4 trigonal pyramids, and  an edgeedge with one O(2)Cu4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 70-75°. In the second O site, O(2) is bonded to two equivalent Cu(1) and two equivalent Cu(2) atoms to form distorted OCu4 trigonal pyramids that share corners with four equivalent O(1)Cu3O tetrahedra, corners with two equivalent O(2)Cu4 trigonal pyramids, corners with four equivalent O(3)Cu4 trigonal pyramids,  an edgeedge with one O(1)Cu3O tetrahedra,  an edgeedge with one O(2)Cu4 trigonal pyramid, and edges with two equivalent O(3)Cu4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Cu(1) and two equivalent Cu(2) atoms to form OCu4 trigonal pyramids that share corners with six equivalent O(1)Cu3O tetrahedra, corners with two equivalent O(3)Cu4 trigonal pyramids, corners with four equivalent O(2)Cu4 trigonal pyramids,  an edgeedge with one O(3)Cu4 trigonal pyramid, and edges with two equivalent O(2)Cu4 trigonal pyramids. is represented by the CIF card [CIF]
data_Cu2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.103
_cell_length_b   5.344
_cell_length_c   7.242
_cell_angle_alpha   52.701
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   218.653
_cell_formula_units_Z   4
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
  Cu  Cu0  1  0.013  0.121  0.137  1.0
  Cu  Cu1  1  0.487  0.121  0.637  1.0
  Cu  Cu2  1  0.256  0.507  0.236  1.0
  Cu  Cu3  1  0.756  0.493  0.264  1.0
  Cu  Cu4  1  0.244  0.507  0.736  1.0
  Cu  Cu5  1  0.744  0.493  0.764  1.0
  Cu  Cu6  1  0.513  0.879  0.363  1.0
  Cu  Cu7  1  0.987  0.879  0.863  1.0
  O  O8  1  0.077  0.997  0.441  1.0
  O  O9  1  0.819  0.488  0.016  1.0
  O  O10  1  0.423  0.997  0.941  1.0
  O  O11  1  0.506  0.281  0.312  1.0
  O  O12  1  0.006  0.719  0.188  1.0
  O  O13  1  0.681  0.488  0.516  1.0
  O  O14  1  0.319  0.512  0.484  1.0
  O  O15  1  0.994  0.281  0.812  1.0
  O  O16  1  0.494  0.719  0.688  1.0
  O  O17  1  0.577  0.003  0.059  1.0
  O  O18  1  0.181  0.512  0.984  1.0
  O  O19  1  0.923  0.003  0.559  1.0
[/CIF]
.