The structure described by Dy2TiO5 crystallizes in the triclinic P1 space group. There are ten inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to one O(1), one O(16), one O(2), one O(22), one O(23), one O(25), and one O(9) atom. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(19), one O(23), one O(25), and one O(5) atom. In the third Dy site, Dy(3) is bonded to one O(1), one O(11), one O(16), one O(21), one O(4), and one O(7) atom to form distorted DyO6 octahedra that share  a cornercorner with one Dy(6)O7 hexagonal pyramid,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  a cornercorner with one Ti(1)O5 trigonal bipyramid,  an edgeedge with one Dy(9)O5 trigonal bipyramid, and  an edgeedge with one Ti(1)O5 trigonal bipyramid. In the fourth Dy site, Dy(4) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(19), one O(2), one O(22), one O(25), one O(5), and one O(7) atom. In the fifth Dy site, Dy(5) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(21), one O(24), one O(3), and one O(8) atom. In the sixth Dy site, Dy(6) is bonded to one O(15), one O(17), one O(20), one O(21), one O(3), one O(6), and one O(8) atom to form distorted DyO7 hexagonal pyramids that share  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  an edgeedge with one Ti(2)O6 octahedra,  an edgeedge with one Ti(5)O6 octahedra, and edges with two equivalent Ti(3)O6 octahedra. The corner-sharing octahedral tilt angles are 60°. In the seventh Dy site, Dy(7) is bonded in a 8-coordinate geometry to one O(12), one O(14), one O(18), one O(20), one O(24), one O(25), one O(3), and one O(9) atom. In the eighth Dy site, Dy(8) is bonded in a 8-coordinate geometry to one O(10), one O(13), one O(17), one O(18), one O(21), one O(3), one O(4), and one O(6) atom. In the ninth Dy site, Dy(9) is bonded to one O(11), one O(4), one O(5), one O(6), and one O(7) atom to form distorted DyO5 trigonal bipyramids that share  a cornercorner with one Dy(6)O7 hexagonal pyramid,  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  an edgeedge with one Dy(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-78°. In the tenth Dy site, Dy(10) is bonded to one O(19), one O(2), one O(22), one O(23), and one O(5) atom to form DyO5 square pyramids that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid, and  a cornercorner with one Ti(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-54°. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(13), one O(16), one O(2), one O(4), and one O(7) atom to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, corners with two equivalent Dy(9)O5 trigonal bipyramids, and  an edgeedge with one Dy(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. In the second Ti site, Ti(2) is bonded to one O(12), one O(20), one O(23), one O(24), one O(8), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, and  an edgeedge with one Dy(6)O7 hexagonal pyramid. The corner-sharing octahedral tilt angles range from 42-53°. In the third Ti site, Ti(3) is bonded to one O(10), one O(13), one O(15), one O(17), one O(6), and one O(8) atom to form distorted TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  a cornercorner with one Ti(1)O5 trigonal bipyramid, and edges with two equivalent Dy(6)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 41-53°. In the fourth Ti site, Ti(4) is bonded to one O(10), one O(14), one O(18), one O(22), one O(24), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, and  a cornercorner with one Dy(10)O5 square pyramid. The corner-sharing octahedral tilt angles range from 42-50°. In the fifth Ti site, Ti(5) is bonded to one O(12), one O(14), one O(17), one O(18), one O(19), and one O(20) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, and  an edgeedge with one Dy(6)O7 hexagonal pyramid. The corner-sharing octahedral tilt angles range from 41-50°. There are twenty-five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(1), one Dy(2), one Dy(3), and one Dy(4) atom to form ODy4 tetrahedra that share  a cornercorner with one O(21)Dy4 tetrahedra, corners with two equivalent O(2)Dy3Ti tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra, corners with three equivalent O(25)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(19)Dy3Ti tetrahedra,  an edgeedge with one O(23)Dy3Ti tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the second O site, O(2) is bonded to one Dy(1), one Dy(10), one Dy(4), and one Ti(1) atom to form distorted ODy3Ti tetrahedra that share corners with two equivalent O(1)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid, corners with three equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(19)Dy3Ti tetrahedra,  an edgeedge with one O(23)Dy3Ti tetrahedra, and  an edgeedge with one O(25)Dy4 tetrahedra. In the third O site, O(3) is bonded to one Dy(5), one Dy(6), one Dy(7), and one Dy(8) atom to form ODy4 tetrahedra that share  a cornercorner with one O(25)Dy4 tetrahedra, corners with two equivalent O(8)Dy2Ti2 tetrahedra, corners with three equivalent O(21)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(6)Dy3Ti tetrahedra, and  an edgeedge with one O(24)Dy2Ti2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Dy(3), one Dy(8), one Dy(9), and one Ti(1) atom to form distorted ODy3Ti trigonal pyramids that share  a cornercorner with one O(2)Dy3Ti tetrahedra,  a cornercorner with one O(1)Dy4 tetrahedra,  a cornercorner with one O(3)Dy4 tetrahedra,  a cornercorner with one O(5)Dy4 tetrahedra,  an edgeedge with one O(6)Dy3Ti tetrahedra, and  an edgeedge with one O(21)Dy4 tetrahedra. In the fifth O site, O(5) is bonded to one Dy(10), one Dy(2), one Dy(4), and one Dy(9) atom to form ODy4 tetrahedra that share  a cornercorner with one O(6)Dy3Ti tetrahedra, corners with two equivalent O(2)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy4 tetrahedra, corners with three equivalent O(19)Dy3Ti tetrahedra,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(23)Dy3Ti tetrahedra,  an edgeedge with one O(25)Dy4 tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the sixth O site, O(6) is bonded to one Dy(6), one Dy(8), one Dy(9), and one Ti(3) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(5)Dy4 tetrahedra, corners with two equivalent O(21)Dy4 tetrahedra,  an edgeedge with one O(8)Dy2Ti2 tetrahedra,  an edgeedge with one O(3)Dy4 tetrahedra, and  an edgeedge with one O(4)Dy3Ti trigonal pyramid. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Dy(3), one Dy(4), one Dy(9), and one Ti(1) atom. In the eighth O site, O(8) is bonded to one Dy(5), one Dy(6), one Ti(2), and one Ti(3) atom to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(23)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(6)Dy3Ti tetrahedra,  an edgeedge with one O(21)Dy4 tetrahedra, and  an edgeedge with one O(24)Dy2Ti2 trigonal pyramid. In the ninth O site, O(9) is bonded to one Dy(1), one Dy(7), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 trigonal pyramids that share  a cornercorner with one O(8)Dy2Ti2 tetrahedra,  a cornercorner with one O(2)Dy3Ti tetrahedra,  a cornercorner with one O(1)Dy4 tetrahedra,  a cornercorner with one O(3)Dy4 tetrahedra, corners with three equivalent O(24)Dy2Ti2 trigonal pyramids,  an edgeedge with one O(23)Dy3Ti tetrahedra,  an edgeedge with one O(25)Dy4 tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Dy(5), one Dy(8), one Ti(3), and one Ti(4) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Dy(2), one Dy(3), and one Dy(9) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Dy(2), one Dy(7), one Ti(2), and one Ti(5) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Dy(8), one Ti(1), and one Ti(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Dy(4), one Dy(7), one Ti(4), and one Ti(5) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Dy(5), one Dy(6), and one Ti(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Dy(1), one Dy(3), and one Ti(1) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Dy(6), one Dy(8), one Ti(3), and one Ti(5) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Dy(7), one Dy(8), one Ti(4), and one Ti(5) atom. In the nineteenth O site, O(19) is bonded to one Dy(10), one Dy(2), one Dy(4), and one Ti(5) atom to form distorted ODy3Ti tetrahedra that share corners with two equivalent O(23)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra, corners with three equivalent O(5)Dy4 tetrahedra, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra, and  an edgeedge with one O(1)Dy4 tetrahedra. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Dy(6), one Dy(7), one Ti(2), and one Ti(5) atom. In the twenty-first O site, O(21) is bonded to one Dy(3), one Dy(5), one Dy(6), and one Dy(8) atom to form ODy4 tetrahedra that share  a cornercorner with one O(1)Dy4 tetrahedra, corners with two equivalent O(6)Dy3Ti tetrahedra, corners with three equivalent O(3)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(8)Dy2Ti2 tetrahedra, and  an edgeedge with one O(4)Dy3Ti trigonal pyramid. In the twenty-second O site, O(22) is bonded to one Dy(1), one Dy(10), one Dy(4), and one Ti(4) atom to form distorted ODy3Ti trigonal pyramids that share corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(23)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra, corners with three equivalent O(2)Dy3Ti tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(1)Dy4 tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. In the twenty-third O site, O(23) is bonded to one Dy(1), one Dy(10), one Dy(2), and one Ti(2) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(8)Dy2Ti2 tetrahedra, corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra,  an edgeedge with one O(1)Dy4 tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. In the twenty-fourth O site, O(24) is bonded to one Dy(5), one Dy(7), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 trigonal pyramids that share  a cornercorner with one O(23)Dy3Ti tetrahedra,  a cornercorner with one O(21)Dy4 tetrahedra,  a cornercorner with one O(25)Dy4 tetrahedra,  a cornercorner with one O(22)Dy3Ti trigonal pyramid, corners with three equivalent O(9)Dy2Ti2 trigonal pyramids,  an edgeedge with one O(8)Dy2Ti2 tetrahedra, and  an edgeedge with one O(3)Dy4 tetrahedra. In the twenty-fifth O site, O(25) is bonded to one Dy(1), one Dy(2), one Dy(4), and one Dy(7) atom to form ODy4 tetrahedra that share  a cornercorner with one O(3)Dy4 tetrahedra, corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(23)Dy3Ti tetrahedra, corners with three equivalent O(1)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2TiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.159
_cell_length_b   7.283
_cell_length_c   12.698
_cell_angle_alpha   91.205
_cell_angle_beta   105.707
_cell_angle_gamma   119.152
_symmetry_Int_Tables_number   1
_cell_volume   547.285
_cell_formula_units_Z   5
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  0.991  0.026  0.980  1.0
  Dy  Dy1  1  0.466  0.485  0.992  1.0
  Dy  Dy2  1  0.499  0.255  0.237  1.0
  Dy  Dy3  1  0.487  0.997  0.990  1.0
  Dy  Dy4  1  0.994  0.522  0.527  1.0
  Dy  Dy5  1  0.519  0.014  0.522  1.0
  Dy  Dy6  1  0.494  0.722  0.751  1.0
  Dy  Dy7  1  0.473  0.497  0.482  1.0
  Dy  Dy8  1  0.593  0.764  0.250  1.0
  Dy  Dy9  1  0.006  0.510  0.013  1.0
  Ti  Ti10  1  0.026  0.210  0.242  1.0
  Ti  Ti11  1  0.991  0.248  0.739  1.0
  Ti  Ti12  1  0.017  0.987  0.499  1.0
  Ti  Ti13  1  0.010  0.768  0.758  1.0
  Ti  Ti14  1  0.507  0.266  0.756  1.0
  O  O15  1  0.354  0.172  0.053  1.0
  O  O16  1  0.900  0.218  0.084  1.0
  O  O17  1  0.369  0.681  0.568  1.0
  O  O18  1  0.325  0.457  0.285  1.0
  O  O19  1  0.374  0.707  0.081  1.0
  O  O20  1  0.656  0.834  0.431  1.0
  O  O21  1  0.699  0.103  0.229  1.0
  O  O22  1  0.925  0.183  0.587  1.0
  O  O23  1  0.905  0.964  0.781  1.0
  O  O24  1  0.913  0.754  0.592  1.0
  O  O25  1  0.674  0.554  0.178  1.0
  O  O26  1  0.315  0.368  0.782  1.0
  O  O27  1  0.077  0.213  0.403  1.0
  O  O28  1  0.328  0.958  0.793  1.0
  O  O29  1  0.091  0.817  0.432  1.0
  O  O30  1  0.099  0.025  0.200  1.0
  O  O31  1  0.323  0.166  0.591  1.0
  O  O32  1  0.676  0.539  0.723  1.0
  O  O33  1  0.641  0.338  0.918  1.0
  O  O34  1  0.668  0.142  0.710  1.0
  O  O35  1  0.620  0.307  0.434  1.0
  O  O36  1  0.067  0.772  0.918  1.0
  O  O37  1  0.084  0.333  0.915  1.0
  O  O38  1  0.076  0.545  0.717  1.0
  O  O39  1  0.623  0.799  0.933  1.0
[/CIF]
.
The structure described by Dy2TiO5 crystallizes in the triclinic P1 space group. There are ten inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to one O(1), one O(16), one O(2), one O(22), one O(23), one O(25), and one O(9) atom. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(19), one O(23), one O(25), and one O(5) atom. In the third Dy site, Dy(3) is bonded to one O(1), one O(11), one O(16), one O(21), one O(4), and one O(7) atom to form distorted DyO6 octahedra that share  a cornercorner with one Dy(6)O7 hexagonal pyramid,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  a cornercorner with one Ti(1)O5 trigonal bipyramid,  an edgeedge with one Dy(9)O5 trigonal bipyramid, and  an edgeedge with one Ti(1)O5 trigonal bipyramid. In the fourth Dy site, Dy(4) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(19), one O(2), one O(22), one O(25), one O(5), and one O(7) atom. In the fifth Dy site, Dy(5) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(21), one O(24), one O(3), and one O(8) atom. In the sixth Dy site, Dy(6) is bonded to one O(15), one O(17), one O(20), one O(21), one O(3), one O(6), and one O(8) atom to form distorted DyO7 hexagonal pyramids that share  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  an edgeedge with one Ti(2)O6 octahedra,  an edgeedge with one Ti(5)O6 octahedra, and edges with two equivalent Ti(3)O6 octahedra. The corner-sharing octahedral tilt angles are 60°. In the seventh Dy site, Dy(7) is bonded in a 8-coordinate geometry to one O(12), one O(14), one O(18), one O(20), one O(24), one O(25), one O(3), and one O(9) atom. In the eighth Dy site, Dy(8) is bonded in a 8-coordinate geometry to one O(10), one O(13), one O(17), one O(18), one O(21), one O(3), one O(4), and one O(6) atom. In the ninth Dy site, Dy(9) is bonded to one O(11), one O(4), one O(5), one O(6), and one O(7) atom to form distorted DyO5 trigonal bipyramids that share  a cornercorner with one Dy(6)O7 hexagonal pyramid,  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, corners with two equivalent Ti(1)O5 trigonal bipyramids, and  an edgeedge with one Dy(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-78°. In the tenth Dy site, Dy(10) is bonded to one O(19), one O(2), one O(22), one O(23), and one O(5) atom to form DyO5 square pyramids that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid, and  a cornercorner with one Ti(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-54°. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(13), one O(16), one O(2), one O(4), and one O(7) atom to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Dy(3)O6 octahedra,  a cornercorner with one Ti(3)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, corners with two equivalent Dy(9)O5 trigonal bipyramids, and  an edgeedge with one Dy(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-46°. In the second Ti site, Ti(2) is bonded to one O(12), one O(20), one O(23), one O(24), one O(8), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, and  an edgeedge with one Dy(6)O7 hexagonal pyramid. The corner-sharing octahedral tilt angles range from 42-53°. In the third Ti site, Ti(3) is bonded to one O(10), one O(13), one O(15), one O(17), one O(6), and one O(8) atom to form distorted TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Ti(4)O6 octahedra,  a cornercorner with one Ti(5)O6 octahedra,  a cornercorner with one Dy(9)O5 trigonal bipyramid,  a cornercorner with one Ti(1)O5 trigonal bipyramid, and edges with two equivalent Dy(6)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 41-53°. In the fourth Ti site, Ti(4) is bonded to one O(10), one O(14), one O(18), one O(22), one O(24), and one O(9) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(5)O6 octahedra, and  a cornercorner with one Dy(10)O5 square pyramid. The corner-sharing octahedral tilt angles range from 42-50°. In the fifth Ti site, Ti(5) is bonded to one O(12), one O(14), one O(17), one O(18), one O(19), and one O(20) atom to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(10)O5 square pyramid, and  an edgeedge with one Dy(6)O7 hexagonal pyramid. The corner-sharing octahedral tilt angles range from 41-50°. There are twenty-five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(1), one Dy(2), one Dy(3), and one Dy(4) atom to form ODy4 tetrahedra that share  a cornercorner with one O(21)Dy4 tetrahedra, corners with two equivalent O(2)Dy3Ti tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra, corners with three equivalent O(25)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(19)Dy3Ti tetrahedra,  an edgeedge with one O(23)Dy3Ti tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the second O site, O(2) is bonded to one Dy(1), one Dy(10), one Dy(4), and one Ti(1) atom to form distorted ODy3Ti tetrahedra that share corners with two equivalent O(1)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid, corners with three equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(19)Dy3Ti tetrahedra,  an edgeedge with one O(23)Dy3Ti tetrahedra, and  an edgeedge with one O(25)Dy4 tetrahedra. In the third O site, O(3) is bonded to one Dy(5), one Dy(6), one Dy(7), and one Dy(8) atom to form ODy4 tetrahedra that share  a cornercorner with one O(25)Dy4 tetrahedra, corners with two equivalent O(8)Dy2Ti2 tetrahedra, corners with three equivalent O(21)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(6)Dy3Ti tetrahedra, and  an edgeedge with one O(24)Dy2Ti2 trigonal pyramid. In the fourth O site, O(4) is bonded to one Dy(3), one Dy(8), one Dy(9), and one Ti(1) atom to form distorted ODy3Ti trigonal pyramids that share  a cornercorner with one O(2)Dy3Ti tetrahedra,  a cornercorner with one O(1)Dy4 tetrahedra,  a cornercorner with one O(3)Dy4 tetrahedra,  a cornercorner with one O(5)Dy4 tetrahedra,  an edgeedge with one O(6)Dy3Ti tetrahedra, and  an edgeedge with one O(21)Dy4 tetrahedra. In the fifth O site, O(5) is bonded to one Dy(10), one Dy(2), one Dy(4), and one Dy(9) atom to form ODy4 tetrahedra that share  a cornercorner with one O(6)Dy3Ti tetrahedra, corners with two equivalent O(2)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy4 tetrahedra, corners with three equivalent O(19)Dy3Ti tetrahedra,  a cornercorner with one O(4)Dy3Ti trigonal pyramid,  an edgeedge with one O(23)Dy3Ti tetrahedra,  an edgeedge with one O(25)Dy4 tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the sixth O site, O(6) is bonded to one Dy(6), one Dy(8), one Dy(9), and one Ti(3) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(5)Dy4 tetrahedra, corners with two equivalent O(21)Dy4 tetrahedra,  an edgeedge with one O(8)Dy2Ti2 tetrahedra,  an edgeedge with one O(3)Dy4 tetrahedra, and  an edgeedge with one O(4)Dy3Ti trigonal pyramid. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Dy(3), one Dy(4), one Dy(9), and one Ti(1) atom. In the eighth O site, O(8) is bonded to one Dy(5), one Dy(6), one Ti(2), and one Ti(3) atom to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(23)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy4 tetrahedra,  a cornercorner with one O(9)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(6)Dy3Ti tetrahedra,  an edgeedge with one O(21)Dy4 tetrahedra, and  an edgeedge with one O(24)Dy2Ti2 trigonal pyramid. In the ninth O site, O(9) is bonded to one Dy(1), one Dy(7), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 trigonal pyramids that share  a cornercorner with one O(8)Dy2Ti2 tetrahedra,  a cornercorner with one O(2)Dy3Ti tetrahedra,  a cornercorner with one O(1)Dy4 tetrahedra,  a cornercorner with one O(3)Dy4 tetrahedra, corners with three equivalent O(24)Dy2Ti2 trigonal pyramids,  an edgeedge with one O(23)Dy3Ti tetrahedra,  an edgeedge with one O(25)Dy4 tetrahedra, and  an edgeedge with one O(22)Dy3Ti trigonal pyramid. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Dy(5), one Dy(8), one Ti(3), and one Ti(4) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Dy(2), one Dy(3), and one Dy(9) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Dy(2), one Dy(7), one Ti(2), and one Ti(5) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Dy(8), one Ti(1), and one Ti(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Dy(4), one Dy(7), one Ti(4), and one Ti(5) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Dy(5), one Dy(6), and one Ti(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Dy(1), one Dy(3), and one Ti(1) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Dy(6), one Dy(8), one Ti(3), and one Ti(5) atom. In the eighteenth O site, O(18) is bonded in a 3-coordinate geometry to one Dy(7), one Dy(8), one Ti(4), and one Ti(5) atom. In the nineteenth O site, O(19) is bonded to one Dy(10), one Dy(2), one Dy(4), and one Ti(5) atom to form distorted ODy3Ti tetrahedra that share corners with two equivalent O(23)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra, corners with three equivalent O(5)Dy4 tetrahedra, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra, and  an edgeedge with one O(1)Dy4 tetrahedra. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Dy(6), one Dy(7), one Ti(2), and one Ti(5) atom. In the twenty-first O site, O(21) is bonded to one Dy(3), one Dy(5), one Dy(6), and one Dy(8) atom to form ODy4 tetrahedra that share  a cornercorner with one O(1)Dy4 tetrahedra, corners with two equivalent O(6)Dy3Ti tetrahedra, corners with three equivalent O(3)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(8)Dy2Ti2 tetrahedra, and  an edgeedge with one O(4)Dy3Ti trigonal pyramid. In the twenty-second O site, O(22) is bonded to one Dy(1), one Dy(10), one Dy(4), and one Ti(4) atom to form distorted ODy3Ti trigonal pyramids that share corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(23)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra, corners with three equivalent O(2)Dy3Ti tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid,  an edgeedge with one O(1)Dy4 tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. In the twenty-third O site, O(23) is bonded to one Dy(1), one Dy(10), one Dy(2), and one Ti(2) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(8)Dy2Ti2 tetrahedra, corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(25)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra,  an edgeedge with one O(1)Dy4 tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. In the twenty-fourth O site, O(24) is bonded to one Dy(5), one Dy(7), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 trigonal pyramids that share  a cornercorner with one O(23)Dy3Ti tetrahedra,  a cornercorner with one O(21)Dy4 tetrahedra,  a cornercorner with one O(25)Dy4 tetrahedra,  a cornercorner with one O(22)Dy3Ti trigonal pyramid, corners with three equivalent O(9)Dy2Ti2 trigonal pyramids,  an edgeedge with one O(8)Dy2Ti2 tetrahedra, and  an edgeedge with one O(3)Dy4 tetrahedra. In the twenty-fifth O site, O(25) is bonded to one Dy(1), one Dy(2), one Dy(4), and one Dy(7) atom to form ODy4 tetrahedra that share  a cornercorner with one O(3)Dy4 tetrahedra, corners with two equivalent O(19)Dy3Ti tetrahedra, corners with two equivalent O(23)Dy3Ti tetrahedra, corners with three equivalent O(1)Dy4 tetrahedra,  a cornercorner with one O(24)Dy2Ti2 trigonal pyramid, corners with two equivalent O(22)Dy3Ti trigonal pyramids,  an edgeedge with one O(2)Dy3Ti tetrahedra,  an edgeedge with one O(5)Dy4 tetrahedra, and  an edgeedge with one O(9)Dy2Ti2 trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2TiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.159
_cell_length_b   7.283
_cell_length_c   12.698
_cell_angle_alpha   91.205
_cell_angle_beta   105.707
_cell_angle_gamma   119.152
_symmetry_Int_Tables_number   1
_cell_volume   547.285
_cell_formula_units_Z   5
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  0.991  0.026  0.980  1.0
  Dy  Dy1  1  0.466  0.485  0.992  1.0
  Dy  Dy2  1  0.499  0.255  0.237  1.0
  Dy  Dy3  1  0.487  0.997  0.990  1.0
  Dy  Dy4  1  0.994  0.522  0.527  1.0
  Dy  Dy5  1  0.519  0.014  0.522  1.0
  Dy  Dy6  1  0.494  0.722  0.751  1.0
  Dy  Dy7  1  0.473  0.497  0.482  1.0
  Dy  Dy8  1  0.593  0.764  0.250  1.0
  Dy  Dy9  1  0.006  0.510  0.013  1.0
  Ti  Ti10  1  0.026  0.210  0.242  1.0
  Ti  Ti11  1  0.991  0.248  0.739  1.0
  Ti  Ti12  1  0.017  0.987  0.499  1.0
  Ti  Ti13  1  0.010  0.768  0.758  1.0
  Ti  Ti14  1  0.507  0.266  0.756  1.0
  O  O15  1  0.354  0.172  0.053  1.0
  O  O16  1  0.900  0.218  0.084  1.0
  O  O17  1  0.369  0.681  0.568  1.0
  O  O18  1  0.325  0.457  0.285  1.0
  O  O19  1  0.374  0.707  0.081  1.0
  O  O20  1  0.656  0.834  0.431  1.0
  O  O21  1  0.699  0.103  0.229  1.0
  O  O22  1  0.925  0.183  0.587  1.0
  O  O23  1  0.905  0.964  0.781  1.0
  O  O24  1  0.913  0.754  0.592  1.0
  O  O25  1  0.674  0.554  0.178  1.0
  O  O26  1  0.315  0.368  0.782  1.0
  O  O27  1  0.077  0.213  0.403  1.0
  O  O28  1  0.328  0.958  0.793  1.0
  O  O29  1  0.091  0.817  0.432  1.0
  O  O30  1  0.099  0.025  0.200  1.0
  O  O31  1  0.323  0.166  0.591  1.0
  O  O32  1  0.676  0.539  0.723  1.0
  O  O33  1  0.641  0.338  0.918  1.0
  O  O34  1  0.668  0.142  0.710  1.0
  O  O35  1  0.620  0.307  0.434  1.0
  O  O36  1  0.067  0.772  0.918  1.0
  O  O37  1  0.084  0.333  0.915  1.0
  O  O38  1  0.076  0.545  0.717  1.0
  O  O39  1  0.623  0.799  0.933  1.0
[/CIF]
.