The crystal structure described by Dy2TiO5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to one O(3), one O(5), two equivalent O(1), and three equivalent O(2) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Dy(2)O7 hexagonal pyramids,  a cornercorner with one Ti(1)O5 trigonal bipyramid, edges with three equivalent Dy(2)O7 hexagonal pyramids, edges with four equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Ti(1)O5 trigonal bipyramids. In the second Dy site, Dy(2) is bonded to one O(1), one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Dy(1)O7 hexagonal pyramids, corners with three equivalent Ti(1)O5 trigonal bipyramids, edges with two equivalent Dy(2)O7 hexagonal pyramids, edges with three equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Ti(1)O5 trigonal bipyramids. Ti(1) is bonded to one O(1), one O(4), one O(5), and two equivalent O(3) atoms to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Dy(1)O7 hexagonal pyramid, corners with three equivalent Dy(2)O7 hexagonal pyramids, corners with two equivalent Ti(1)O5 trigonal bipyramids, edges with two equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Dy(2)O7 hexagonal pyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(2), two equivalent Dy(1), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(3)Dy2Ti2 tetrahedra,  a cornercorner with one O(5)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, corners with five equivalent O(2)Dy4 tetrahedra,  an edgeedge with one O(2)Dy4 tetrahedra, edges with two equivalent O(3)Dy2Ti2 tetrahedra, and edges with two equivalent O(5)Dy3Ti tetrahedra. In the second O site, O(2) is bonded to one Dy(2) and three equivalent Dy(1) atoms to form ODy4 tetrahedra that share corners with two equivalent O(3)Dy2Ti2 tetrahedra, corners with two equivalent O(2)Dy4 tetrahedra, corners with five equivalent O(1)Dy3Ti tetrahedra, corners with five equivalent O(5)Dy3Ti tetrahedra,  an edgeedge with one O(3)Dy2Ti2 tetrahedra,  an edgeedge with one O(1)Dy3Ti tetrahedra, and edges with two equivalent O(2)Dy4 tetrahedra. In the third O site, O(3) is bonded to one Dy(1), one Dy(2), and two equivalent Ti(1) atoms to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra,  a cornercorner with one O(5)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy2Ti2 tetrahedra, corners with two equivalent O(2)Dy4 tetrahedra,  an edgeedge with one O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy3Ti tetrahedra, and edges with two equivalent O(5)Dy3Ti tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Dy(2) and one Ti(1) atom. In the fifth O site, O(5) is bonded to one Dy(1), two equivalent Dy(2), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(3)Dy2Ti2 tetrahedra,  a cornercorner with one O(1)Dy3Ti tetrahedra, corners with two equivalent O(5)Dy3Ti tetrahedra, corners with five equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(3)Dy2Ti2 tetrahedra, and edges with two equivalent O(1)Dy3Ti tetrahedra. is represented by the CIF file [CIF]
data_Dy2TiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.679
_cell_length_b   10.346
_cell_length_c   11.246
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   428.006
_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
  Dy  Dy0  1  0.250  0.136  0.944  1.0
  Dy  Dy1  1  0.250  0.636  0.556  1.0
  Dy  Dy2  1  0.750  0.864  0.056  1.0
  Dy  Dy3  1  0.750  0.364  0.444  1.0
  Dy  Dy4  1  0.750  0.385  0.777  1.0
  Dy  Dy5  1  0.750  0.885  0.723  1.0
  Dy  Dy6  1  0.250  0.615  0.223  1.0
  Dy  Dy7  1  0.250  0.115  0.277  1.0
  Ti  Ti8  1  0.250  0.175  0.619  1.0
  Ti  Ti9  1  0.250  0.675  0.881  1.0
  Ti  Ti10  1  0.750  0.825  0.381  1.0
  Ti  Ti11  1  0.750  0.325  0.119  1.0
  O  O12  1  0.250  0.224  0.457  1.0
  O  O13  1  0.250  0.724  0.043  1.0
  O  O14  1  0.750  0.776  0.543  1.0
  O  O15  1  0.750  0.276  0.957  1.0
  O  O16  1  0.250  0.493  0.395  1.0
  O  O17  1  0.250  0.993  0.105  1.0
  O  O18  1  0.750  0.507  0.605  1.0
  O  O19  1  0.750  0.007  0.895  1.0
  O  O20  1  0.250  0.262  0.117  1.0
  O  O21  1  0.250  0.762  0.383  1.0
  O  O22  1  0.750  0.738  0.883  1.0
  O  O23  1  0.750  0.238  0.617  1.0
  O  O24  1  0.250  0.007  0.655  1.0
  O  O25  1  0.250  0.507  0.845  1.0
  O  O26  1  0.750  0.993  0.345  1.0
  O  O27  1  0.750  0.493  0.155  1.0
  O  O28  1  0.250  0.257  0.771  1.0
  O  O29  1  0.250  0.757  0.729  1.0
  O  O30  1  0.750  0.743  0.229  1.0
  O  O31  1  0.750  0.243  0.271  1.0
[/CIF]
.
The crystal structure described by Dy2TiO5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to one O(3), one O(5), two equivalent O(1), and three equivalent O(2) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Dy(2)O7 hexagonal pyramids,  a cornercorner with one Ti(1)O5 trigonal bipyramid, edges with three equivalent Dy(2)O7 hexagonal pyramids, edges with four equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Ti(1)O5 trigonal bipyramids. In the second Dy site, Dy(2) is bonded to one O(1), one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Dy(1)O7 hexagonal pyramids, corners with three equivalent Ti(1)O5 trigonal bipyramids, edges with two equivalent Dy(2)O7 hexagonal pyramids, edges with three equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Ti(1)O5 trigonal bipyramids. Ti(1) is bonded to one O(1), one O(4), one O(5), and two equivalent O(3) atoms to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Dy(1)O7 hexagonal pyramid, corners with three equivalent Dy(2)O7 hexagonal pyramids, corners with two equivalent Ti(1)O5 trigonal bipyramids, edges with two equivalent Dy(1)O7 hexagonal pyramids, and edges with two equivalent Dy(2)O7 hexagonal pyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(2), two equivalent Dy(1), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(3)Dy2Ti2 tetrahedra,  a cornercorner with one O(5)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, corners with five equivalent O(2)Dy4 tetrahedra,  an edgeedge with one O(2)Dy4 tetrahedra, edges with two equivalent O(3)Dy2Ti2 tetrahedra, and edges with two equivalent O(5)Dy3Ti tetrahedra. In the second O site, O(2) is bonded to one Dy(2) and three equivalent Dy(1) atoms to form ODy4 tetrahedra that share corners with two equivalent O(3)Dy2Ti2 tetrahedra, corners with two equivalent O(2)Dy4 tetrahedra, corners with five equivalent O(1)Dy3Ti tetrahedra, corners with five equivalent O(5)Dy3Ti tetrahedra,  an edgeedge with one O(3)Dy2Ti2 tetrahedra,  an edgeedge with one O(1)Dy3Ti tetrahedra, and edges with two equivalent O(2)Dy4 tetrahedra. In the third O site, O(3) is bonded to one Dy(1), one Dy(2), and two equivalent Ti(1) atoms to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra,  a cornercorner with one O(5)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy2Ti2 tetrahedra, corners with two equivalent O(2)Dy4 tetrahedra,  an edgeedge with one O(2)Dy4 tetrahedra, edges with two equivalent O(1)Dy3Ti tetrahedra, and edges with two equivalent O(5)Dy3Ti tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Dy(2) and one Ti(1) atom. In the fifth O site, O(5) is bonded to one Dy(1), two equivalent Dy(2), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(3)Dy2Ti2 tetrahedra,  a cornercorner with one O(1)Dy3Ti tetrahedra, corners with two equivalent O(5)Dy3Ti tetrahedra, corners with five equivalent O(2)Dy4 tetrahedra, edges with two equivalent O(3)Dy2Ti2 tetrahedra, and edges with two equivalent O(1)Dy3Ti tetrahedra. is represented by the CIF file [CIF]
data_Dy2TiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.679
_cell_length_b   10.346
_cell_length_c   11.246
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   428.006
_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
  Dy  Dy0  1  0.250  0.136  0.944  1.0
  Dy  Dy1  1  0.250  0.636  0.556  1.0
  Dy  Dy2  1  0.750  0.864  0.056  1.0
  Dy  Dy3  1  0.750  0.364  0.444  1.0
  Dy  Dy4  1  0.750  0.385  0.777  1.0
  Dy  Dy5  1  0.750  0.885  0.723  1.0
  Dy  Dy6  1  0.250  0.615  0.223  1.0
  Dy  Dy7  1  0.250  0.115  0.277  1.0
  Ti  Ti8  1  0.250  0.175  0.619  1.0
  Ti  Ti9  1  0.250  0.675  0.881  1.0
  Ti  Ti10  1  0.750  0.825  0.381  1.0
  Ti  Ti11  1  0.750  0.325  0.119  1.0
  O  O12  1  0.250  0.224  0.457  1.0
  O  O13  1  0.250  0.724  0.043  1.0
  O  O14  1  0.750  0.776  0.543  1.0
  O  O15  1  0.750  0.276  0.957  1.0
  O  O16  1  0.250  0.493  0.395  1.0
  O  O17  1  0.250  0.993  0.105  1.0
  O  O18  1  0.750  0.507  0.605  1.0
  O  O19  1  0.750  0.007  0.895  1.0
  O  O20  1  0.250  0.262  0.117  1.0
  O  O21  1  0.250  0.762  0.383  1.0
  O  O22  1  0.750  0.738  0.883  1.0
  O  O23  1  0.750  0.238  0.617  1.0
  O  O24  1  0.250  0.007  0.655  1.0
  O  O25  1  0.250  0.507  0.845  1.0
  O  O26  1  0.750  0.993  0.345  1.0
  O  O27  1  0.750  0.493  0.155  1.0
  O  O28  1  0.250  0.257  0.771  1.0
  O  O29  1  0.250  0.757  0.729  1.0
  O  O30  1  0.750  0.743  0.229  1.0
  O  O31  1  0.750  0.243  0.271  1.0
[/CIF]
.