The structure described by Dy2CuO4 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Dy(1) and two equivalent Cu(1) atoms to form distorted ODy4Cu2 octahedra that share corners with two equivalent O(1)Dy4Cu2 octahedra, corners with twelve equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy4Cu2 octahedra, edges with two equivalent O(2)Dy4 tetrahedra, and faces with four equivalent O(1)Dy4Cu2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Dy(1) atoms to form ODy4 tetrahedra that share corners with twelve equivalent O(1)Dy4Cu2 octahedra, corners with four equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy4Cu2 octahedra, and edges with four equivalent O(2)Dy4 tetrahedra. The corner-sharing octahedral tilt angles range from 12-70°. is represented by the CIF file [CIF]
data_Dy2CuO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   6.480
_cell_length_c   6.480
_cell_angle_alpha   145.216
_cell_angle_beta   145.216
_cell_angle_gamma   50.012
_symmetry_Int_Tables_number   1
_cell_volume   88.132
_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
  Dy  Dy0  1  0.348  0.348  0.000  1.0
  Dy  Dy1  1  0.652  0.652  0.000  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.500  0.000  0.500  1.0
  O  O4  1  0.750  0.250  0.500  1.0
  O  O5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.250  0.750  0.500  1.0
[/CIF]
.
The structure described by Dy2CuO4 crystallizes in the tetragonal I4/mmm space group. Dy(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Dy(1) and two equivalent Cu(1) atoms to form distorted ODy4Cu2 octahedra that share corners with two equivalent O(1)Dy4Cu2 octahedra, corners with twelve equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy4Cu2 octahedra, edges with two equivalent O(2)Dy4 tetrahedra, and faces with four equivalent O(1)Dy4Cu2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Dy(1) atoms to form ODy4 tetrahedra that share corners with twelve equivalent O(1)Dy4Cu2 octahedra, corners with four equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy4Cu2 octahedra, and edges with four equivalent O(2)Dy4 tetrahedra. The corner-sharing octahedral tilt angles range from 12-70°. is represented by the CIF file [CIF]
data_Dy2CuO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.480
_cell_length_b   6.480
_cell_length_c   6.480
_cell_angle_alpha   145.216
_cell_angle_beta   145.216
_cell_angle_gamma   50.012
_symmetry_Int_Tables_number   1
_cell_volume   88.132
_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
  Dy  Dy0  1  0.348  0.348  0.000  1.0
  Dy  Dy1  1  0.652  0.652  0.000  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.500  0.000  0.500  1.0
  O  O4  1  0.750  0.250  0.500  1.0
  O  O5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.250  0.750  0.500  1.0
[/CIF]
.