The material described by Ho2Cu2O5 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(5) atoms to form a mixture of distorted corner and edge-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. In the second Ho site, Ho(2) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded to one Ho(2), two equivalent Ho(1), and one Cu(1) atom to form OHo3Cu tetrahedra that share corners with two equivalent O(5)Ho3Cu tetrahedra, corners with four equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(2)Ho2Cu2 trigonal pyramids, corners with three equivalent O(4)Ho2Cu2 trigonal pyramids, and  an edgeedge with one O(2)Ho2Cu2 trigonal pyramid. In the second O site, O(1) is bonded to one Ho(1), two equivalent Ho(2), and one Cu(2) atom to form OHo3Cu tetrahedra that share corners with two equivalent O(1)Ho3Cu tetrahedra, corners with four equivalent O(5)Ho3Cu tetrahedra, corners with three equivalent O(2)Ho2Cu2 trigonal pyramids, corners with three equivalent O(4)Ho2Cu2 trigonal pyramids, and  an edgeedge with one O(4)Ho2Cu2 trigonal pyramid. In the third O site, O(2) is bonded to two equivalent Ho(1), one Cu(1), and one Cu(2) atom to form distorted OHo2Cu2 trigonal pyramids that share corners with three equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(5)Ho3Cu tetrahedra, corners with two equivalent O(2)Ho2Cu2 trigonal pyramids,  an edgeedge with one O(5)Ho3Cu tetrahedra, and  an edgeedge with one O(4)Ho2Cu2 trigonal pyramid. In the fourth O site, O(3) is bonded in a distorted see-saw-like geometry to one Ho(1), one Ho(2), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded to two equivalent Ho(2), one Cu(1), and one Cu(2) atom to form distorted OHo2Cu2 trigonal pyramids that share corners with three equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(5)Ho3Cu tetrahedra, corners with two equivalent O(4)Ho2Cu2 trigonal pyramids,  an edgeedge with one O(1)Ho3Cu tetrahedra, and  an edgeedge with one O(2)Ho2Cu2 trigonal pyramid. is represented by the CIF card [CIF]
data_Ho2Cu2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.510
_cell_length_b   10.881
_cell_length_c   12.517
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   478.016
_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
  Ho  Ho0  1  0.278  0.543  0.831  1.0
  Ho  Ho1  1  0.722  0.457  0.331  1.0
  Ho  Ho2  1  0.222  0.043  0.831  1.0
  Ho  Ho3  1  0.778  0.957  0.331  1.0
  Ho  Ho4  1  0.279  0.708  0.503  1.0
  Ho  Ho5  1  0.721  0.292  0.003  1.0
  Ho  Ho6  1  0.221  0.208  0.503  1.0
  Ho  Ho7  1  0.779  0.792  0.003  1.0
  Cu  Cu8  1  0.844  0.762  0.719  1.0
  Cu  Cu9  1  0.156  0.238  0.219  1.0
  Cu  Cu10  1  0.656  0.262  0.719  1.0
  Cu  Cu11  1  0.344  0.738  0.219  1.0
  Cu  Cu12  1  0.840  0.488  0.613  1.0
  Cu  Cu13  1  0.160  0.512  0.113  1.0
  Cu  Cu14  1  0.660  0.988  0.613  1.0
  Cu  Cu15  1  0.340  0.012  0.113  1.0
  O  O16  1  0.273  0.923  0.974  1.0
  O  O17  1  0.727  0.077  0.474  1.0
  O  O18  1  0.227  0.423  0.974  1.0
  O  O19  1  0.773  0.577  0.474  1.0
  O  O20  1  0.725  0.928  0.765  1.0
  O  O21  1  0.275  0.072  0.265  1.0
  O  O22  1  0.775  0.428  0.765  1.0
  O  O23  1  0.225  0.572  0.265  1.0
  O  O24  1  0.155  0.625  0.667  1.0
  O  O25  1  0.845  0.375  0.167  1.0
  O  O26  1  0.345  0.125  0.667  1.0
  O  O27  1  0.655  0.875  0.167  1.0
  O  O28  1  0.781  0.822  0.568  1.0
  O  O29  1  0.219  0.178  0.068  1.0
  O  O30  1  0.719  0.322  0.568  1.0
  O  O31  1  0.281  0.678  0.068  1.0
  O  O32  1  0.275  0.827  0.359  1.0
  O  O33  1  0.725  0.173  0.859  1.0
  O  O34  1  0.225  0.327  0.359  1.0
  O  O35  1  0.775  0.673  0.859  1.0
[/CIF]
.
The material described by Ho2Cu2O5 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(5) atoms to form a mixture of distorted corner and edge-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. In the second Ho site, Ho(2) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 22-64°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded to one Ho(2), two equivalent Ho(1), and one Cu(1) atom to form OHo3Cu tetrahedra that share corners with two equivalent O(5)Ho3Cu tetrahedra, corners with four equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(2)Ho2Cu2 trigonal pyramids, corners with three equivalent O(4)Ho2Cu2 trigonal pyramids, and  an edgeedge with one O(2)Ho2Cu2 trigonal pyramid. In the second O site, O(1) is bonded to one Ho(1), two equivalent Ho(2), and one Cu(2) atom to form OHo3Cu tetrahedra that share corners with two equivalent O(1)Ho3Cu tetrahedra, corners with four equivalent O(5)Ho3Cu tetrahedra, corners with three equivalent O(2)Ho2Cu2 trigonal pyramids, corners with three equivalent O(4)Ho2Cu2 trigonal pyramids, and  an edgeedge with one O(4)Ho2Cu2 trigonal pyramid. In the third O site, O(2) is bonded to two equivalent Ho(1), one Cu(1), and one Cu(2) atom to form distorted OHo2Cu2 trigonal pyramids that share corners with three equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(5)Ho3Cu tetrahedra, corners with two equivalent O(2)Ho2Cu2 trigonal pyramids,  an edgeedge with one O(5)Ho3Cu tetrahedra, and  an edgeedge with one O(4)Ho2Cu2 trigonal pyramid. In the fourth O site, O(3) is bonded in a distorted see-saw-like geometry to one Ho(1), one Ho(2), one Cu(1), and one Cu(2) atom. In the fifth O site, O(4) is bonded to two equivalent Ho(2), one Cu(1), and one Cu(2) atom to form distorted OHo2Cu2 trigonal pyramids that share corners with three equivalent O(1)Ho3Cu tetrahedra, corners with three equivalent O(5)Ho3Cu tetrahedra, corners with two equivalent O(4)Ho2Cu2 trigonal pyramids,  an edgeedge with one O(1)Ho3Cu tetrahedra, and  an edgeedge with one O(2)Ho2Cu2 trigonal pyramid. is represented by the CIF card [CIF]
data_Ho2Cu2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.510
_cell_length_b   10.881
_cell_length_c   12.517
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   478.016
_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
  Ho  Ho0  1  0.278  0.543  0.831  1.0
  Ho  Ho1  1  0.722  0.457  0.331  1.0
  Ho  Ho2  1  0.222  0.043  0.831  1.0
  Ho  Ho3  1  0.778  0.957  0.331  1.0
  Ho  Ho4  1  0.279  0.708  0.503  1.0
  Ho  Ho5  1  0.721  0.292  0.003  1.0
  Ho  Ho6  1  0.221  0.208  0.503  1.0
  Ho  Ho7  1  0.779  0.792  0.003  1.0
  Cu  Cu8  1  0.844  0.762  0.719  1.0
  Cu  Cu9  1  0.156  0.238  0.219  1.0
  Cu  Cu10  1  0.656  0.262  0.719  1.0
  Cu  Cu11  1  0.344  0.738  0.219  1.0
  Cu  Cu12  1  0.840  0.488  0.613  1.0
  Cu  Cu13  1  0.160  0.512  0.113  1.0
  Cu  Cu14  1  0.660  0.988  0.613  1.0
  Cu  Cu15  1  0.340  0.012  0.113  1.0
  O  O16  1  0.273  0.923  0.974  1.0
  O  O17  1  0.727  0.077  0.474  1.0
  O  O18  1  0.227  0.423  0.974  1.0
  O  O19  1  0.773  0.577  0.474  1.0
  O  O20  1  0.725  0.928  0.765  1.0
  O  O21  1  0.275  0.072  0.265  1.0
  O  O22  1  0.775  0.428  0.765  1.0
  O  O23  1  0.225  0.572  0.265  1.0
  O  O24  1  0.155  0.625  0.667  1.0
  O  O25  1  0.845  0.375  0.167  1.0
  O  O26  1  0.345  0.125  0.667  1.0
  O  O27  1  0.655  0.875  0.167  1.0
  O  O28  1  0.781  0.822  0.568  1.0
  O  O29  1  0.219  0.178  0.068  1.0
  O  O30  1  0.719  0.322  0.568  1.0
  O  O31  1  0.281  0.678  0.068  1.0
  O  O32  1  0.275  0.827  0.359  1.0
  O  O33  1  0.725  0.173  0.859  1.0
  O  O34  1  0.225  0.327  0.359  1.0
  O  O35  1  0.775  0.673  0.859  1.0
[/CIF]
.