Dy10Ti6O27 crystallizes in the monoclinic Cm space group. There are eight inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 6-coordinate geometry to one O(15), one O(5), two equivalent O(13), and two equivalent O(3) atoms. In the second Dy site, Dy(2) is bonded in a 6-coordinate geometry to one O(18), one O(2), two equivalent O(13), and two equivalent O(3) atoms. In the third Dy site, Dy(3) is bonded to one O(5), one O(7), one O(8), two equivalent O(1), and two equivalent O(9) atoms to form distorted DyO7 pentagonal bipyramids that share  a cornercorner with one Ti(3)O6 octahedra and edges with two equivalent Ti(4)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. In the fourth Dy site, Dy(4) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. In the fifth Dy site, Dy(5) is bonded to one O(10), one O(12), one O(16), two equivalent O(11), and two equivalent O(6) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(8)O7 pentagonal bipyramid, edges with two equivalent Ti(3)O6 octahedra, and edges with two equivalent Ti(4)O6 octahedra. The corner-sharing octahedral tilt angles are 57°. In the sixth Dy site, Dy(6) is bonded in a 6-coordinate geometry to one O(12), one O(2), two equivalent O(1), and two equivalent O(9) atoms. In the seventh Dy site, Dy(7) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(15), one O(17), and one O(18) atom. In the eighth Dy site, Dy(8) is bonded to one O(10), one O(18), one O(19), two equivalent O(17), and two equivalent O(4) atoms to form distorted DyO7 pentagonal bipyramids that share  a cornercorner with one Dy(5)O7 hexagonal pyramid, corners with two equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(2), one O(3), one O(4), and one O(9) atom. In the second Ti site, Ti(2) is bonded to one O(14), one O(15), two equivalent O(17), and two equivalent O(4) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, and edges with two equivalent Dy(8)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-61°. In the third Ti site, Ti(3) is bonded to one O(14), one O(8), two equivalent O(11), and two equivalent O(6) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(3)O7 pentagonal bipyramid, and edges with two equivalent Dy(5)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 46-52°. In the fourth Ti site, Ti(4) is bonded to one O(1), one O(11), one O(16), one O(17), one O(6), and one O(7) atom to form distorted TiO6 octahedra that share  a cornercorner with one Dy(5)O7 hexagonal pyramid,  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(8)O7 pentagonal bipyramid,  an edgeedge with one Dy(5)O7 hexagonal pyramid, and  an edgeedge with one Dy(3)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 27-61°. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to one Dy(3), one Dy(4), one Dy(6), and one Ti(4) atom to form distorted ODy3Ti tetrahedra that share  a cornercorner with one O(17)Dy2Ti2 tetrahedra,  a cornercorner with one O(2)Dy2Ti2 tetrahedra,  a cornercorner with one O(3)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, corners with two equivalent O(8)Dy3Ti tetrahedra, corners with two equivalent O(12)Dy4 tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the second O site, O(2) is bonded to one Dy(2), one Dy(6), and two equivalent Ti(1) atoms to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(12)Dy4 tetrahedra,  a cornercorner with one O(18)Dy4 tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, and corners with four equivalent O(3)Dy3Ti tetrahedra. In the third O site, O(3) is bonded to one Dy(1), one Dy(2), one Dy(4), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra,  a cornercorner with one O(15)Dy3Ti tetrahedra,  a cornercorner with one O(8)Dy3Ti tetrahedra,  a cornercorner with one O(12)Dy4 tetrahedra,  a cornercorner with one O(18)Dy4 tetrahedra, corners with two equivalent O(2)Dy2Ti2 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Dy(8), one Ti(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded to one Dy(1), one Dy(3), and two equivalent Dy(4) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(15)Dy3Ti tetrahedra, corners with three equivalent O(8)Dy3Ti tetrahedra,  an edgeedge with one O(12)Dy4 tetrahedra, edges with two equivalent O(1)Dy3Ti tetrahedra, and edges with two equivalent O(3)Dy3Ti tetrahedra. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Dy(4), one Dy(5), one Ti(3), and one Ti(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Dy(3) and two equivalent Ti(4) atoms. In the eighth O site, O(8) is bonded to one Dy(3), two equivalent Dy(4), and one Ti(3) atom to form ODy3Ti tetrahedra that share corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(12)Dy4 tetrahedra, corners with three equivalent O(5)Dy4 tetrahedra, and corners with four equivalent O(1)Dy3Ti tetrahedra. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Dy(3), one Dy(4), one Dy(6), and one Ti(1) atom. In the tenth O site, O(10) is bonded to one Dy(5), one Dy(8), and two equivalent Dy(7) atoms to form distorted ODy4 tetrahedra that share  a cornercorner with one O(12)Dy4 tetrahedra, corners with three equivalent O(18)Dy4 tetrahedra, corners with four equivalent O(17)Dy2Ti2 tetrahedra, and  an edgeedge with one O(15)Dy3Ti tetrahedra. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Dy(5), one Dy(7), one Ti(3), and one Ti(4) atom. In the twelfth O site, O(12) is bonded to one Dy(5), one Dy(6), and two equivalent Dy(4) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(2)Dy2Ti2 tetrahedra,  a cornercorner with one O(10)Dy4 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(8)Dy3Ti tetrahedra, corners with four equivalent O(1)Dy3Ti tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Dy(1), one Dy(2), one Dy(7), and one Ti(1) atom. In the fourteenth O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Dy(7), one Ti(2), and one Ti(3) atom. In the fifteenth O site, O(15) is bonded to one Dy(1), two equivalent Dy(7), and one Ti(2) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(5)Dy4 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(18)Dy4 tetrahedra,  an edgeedge with one O(10)Dy4 tetrahedra, and edges with two equivalent O(17)Dy2Ti2 tetrahedra. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Dy(5) and two equivalent Ti(4) atoms. In the seventeenth O site, O(17) is bonded to one Dy(7), one Dy(8), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra, corners with two equivalent O(17)Dy2Ti2 tetrahedra, corners with two equivalent O(10)Dy4 tetrahedra,  an edgeedge with one O(15)Dy3Ti tetrahedra, and  an edgeedge with one O(18)Dy4 tetrahedra. In the eighteenth O site, O(18) is bonded to one Dy(2), one Dy(8), and two equivalent Dy(7) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(2)Dy2Ti2 tetrahedra, corners with two equivalent O(15)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with three equivalent O(10)Dy4 tetrahedra, and edges with two equivalent O(17)Dy2Ti2 tetrahedra. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Dy(8) and two equivalent Ti(1) atoms.
Dy10Ti6O27 crystallizes in the monoclinic Cm space group. There are eight inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 6-coordinate geometry to one O(15), one O(5), two equivalent O(13), and two equivalent O(3) atoms. The Dy(1)-O(15) bond length is 2.36 Å. The Dy(1)-O(5) bond length is 2.25 Å. Both Dy(1)-O(13) bond lengths are 2.34 Å. Both Dy(1)-O(3) bond lengths are 2.31 Å. In the second Dy site, Dy(2) is bonded in a 6-coordinate geometry to one O(18), one O(2), two equivalent O(13), and two equivalent O(3) atoms. The Dy(2)-O(18) bond length is 2.13 Å. The Dy(2)-O(2) bond length is 2.34 Å. Both Dy(2)-O(13) bond lengths are 2.42 Å. Both Dy(2)-O(3) bond lengths are 2.24 Å. In the third Dy site, Dy(3) is bonded to one O(5), one O(7), one O(8), two equivalent O(1), and two equivalent O(9) atoms to form distorted DyO7 pentagonal bipyramids that share  a cornercorner with one Ti(3)O6 octahedra and edges with two equivalent Ti(4)O6 octahedra. The corner-sharing octahedral tilt angles are 70°. The Dy(3)-O(5) bond length is 2.19 Å. The Dy(3)-O(7) bond length is 2.33 Å. The Dy(3)-O(8) bond length is 2.40 Å. Both Dy(3)-O(1) bond lengths are 2.38 Å. Both Dy(3)-O(9) bond lengths are 2.30 Å. In the fourth Dy site, Dy(4) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(3), one O(5), one O(6), one O(8), and one O(9) atom. The Dy(4)-O(1) bond length is 2.29 Å. The Dy(4)-O(12) bond length is 2.24 Å. The Dy(4)-O(3) bond length is 2.23 Å. The Dy(4)-O(5) bond length is 2.27 Å. The Dy(4)-O(6) bond length is 2.64 Å. The Dy(4)-O(8) bond length is 2.40 Å. The Dy(4)-O(9) bond length is 2.53 Å. In the fifth Dy site, Dy(5) is bonded to one O(10), one O(12), one O(16), two equivalent O(11), and two equivalent O(6) atoms to form distorted DyO7 hexagonal pyramids that share corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(8)O7 pentagonal bipyramid, edges with two equivalent Ti(3)O6 octahedra, and edges with two equivalent Ti(4)O6 octahedra. The corner-sharing octahedral tilt angles are 57°. The Dy(5)-O(10) bond length is 2.21 Å. The Dy(5)-O(12) bond length is 2.21 Å. The Dy(5)-O(16) bond length is 2.32 Å. Both Dy(5)-O(11) bond lengths are 2.43 Å. Both Dy(5)-O(6) bond lengths are 2.46 Å. In the sixth Dy site, Dy(6) is bonded in a 6-coordinate geometry to one O(12), one O(2), two equivalent O(1), and two equivalent O(9) atoms. The Dy(6)-O(12) bond length is 2.14 Å. The Dy(6)-O(2) bond length is 2.28 Å. Both Dy(6)-O(1) bond lengths are 2.23 Å. Both Dy(6)-O(9) bond lengths are 2.38 Å. In the seventh Dy site, Dy(7) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(15), one O(17), and one O(18) atom. The Dy(7)-O(10) bond length is 2.33 Å. The Dy(7)-O(11) bond length is 2.31 Å. The Dy(7)-O(13) bond length is 2.55 Å. The Dy(7)-O(14) bond length is 2.66 Å. The Dy(7)-O(15) bond length is 2.23 Å. The Dy(7)-O(17) bond length is 2.35 Å. The Dy(7)-O(18) bond length is 2.24 Å. In the eighth Dy site, Dy(8) is bonded to one O(10), one O(18), one O(19), two equivalent O(17), and two equivalent O(4) atoms to form distorted DyO7 pentagonal bipyramids that share  a cornercorner with one Dy(5)O7 hexagonal pyramid, corners with two equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Dy(8)-O(10) bond length is 2.21 Å. The Dy(8)-O(18) bond length is 2.26 Å. The Dy(8)-O(19) bond length is 2.26 Å. Both Dy(8)-O(17) bond lengths are 2.36 Å. Both Dy(8)-O(4) bond lengths are 2.59 Å. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(2), one O(3), one O(4), and one O(9) atom. The Ti(1)-O(13) bond length is 1.88 Å. The Ti(1)-O(19) bond length is 1.90 Å. The Ti(1)-O(2) bond length is 2.04 Å. The Ti(1)-O(3) bond length is 2.47 Å. The Ti(1)-O(4) bond length is 1.97 Å. The Ti(1)-O(9) bond length is 1.89 Å. In the second Ti site, Ti(2) is bonded to one O(14), one O(15), two equivalent O(17), and two equivalent O(4) atoms to form distorted TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra, and edges with two equivalent Dy(8)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-61°. The Ti(2)-O(14) bond length is 1.94 Å. The Ti(2)-O(15) bond length is 1.97 Å. Both Ti(2)-O(17) bond lengths are 2.31 Å. Both Ti(2)-O(4) bond lengths are 1.85 Å. In the third Ti site, Ti(3) is bonded to one O(14), one O(8), two equivalent O(11), and two equivalent O(6) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(2)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(3)O7 pentagonal bipyramid, and edges with two equivalent Dy(5)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 46-52°. The Ti(3)-O(14) bond length is 2.03 Å. The Ti(3)-O(8) bond length is 1.93 Å. Both Ti(3)-O(11) bond lengths are 1.91 Å. Both Ti(3)-O(6) bond lengths are 2.16 Å. In the fourth Ti site, Ti(4) is bonded to one O(1), one O(11), one O(16), one O(17), one O(6), and one O(7) atom to form distorted TiO6 octahedra that share  a cornercorner with one Dy(5)O7 hexagonal pyramid,  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with two equivalent Ti(4)O6 octahedra,  a cornercorner with one Dy(8)O7 pentagonal bipyramid,  an edgeedge with one Dy(5)O7 hexagonal pyramid, and  an edgeedge with one Dy(3)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 27-61°. The Ti(4)-O(1) bond length is 2.09 Å. The Ti(4)-O(11) bond length is 2.26 Å. The Ti(4)-O(16) bond length is 1.97 Å. The Ti(4)-O(17) bond length is 1.96 Å. The Ti(4)-O(6) bond length is 1.85 Å. The Ti(4)-O(7) bond length is 1.92 Å. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to one Dy(3), one Dy(4), one Dy(6), and one Ti(4) atom to form distorted ODy3Ti tetrahedra that share  a cornercorner with one O(17)Dy2Ti2 tetrahedra,  a cornercorner with one O(2)Dy2Ti2 tetrahedra,  a cornercorner with one O(3)Dy3Ti tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, corners with two equivalent O(8)Dy3Ti tetrahedra, corners with two equivalent O(12)Dy4 tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the second O site, O(2) is bonded to one Dy(2), one Dy(6), and two equivalent Ti(1) atoms to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(12)Dy4 tetrahedra,  a cornercorner with one O(18)Dy4 tetrahedra, corners with two equivalent O(1)Dy3Ti tetrahedra, and corners with four equivalent O(3)Dy3Ti tetrahedra. In the third O site, O(3) is bonded to one Dy(1), one Dy(2), one Dy(4), and one Ti(1) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra,  a cornercorner with one O(15)Dy3Ti tetrahedra,  a cornercorner with one O(8)Dy3Ti tetrahedra,  a cornercorner with one O(12)Dy4 tetrahedra,  a cornercorner with one O(18)Dy4 tetrahedra, corners with two equivalent O(2)Dy2Ti2 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Dy(8), one Ti(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded to one Dy(1), one Dy(3), and two equivalent Dy(4) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(15)Dy3Ti tetrahedra, corners with three equivalent O(8)Dy3Ti tetrahedra,  an edgeedge with one O(12)Dy4 tetrahedra, edges with two equivalent O(1)Dy3Ti tetrahedra, and edges with two equivalent O(3)Dy3Ti tetrahedra. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Dy(4), one Dy(5), one Ti(3), and one Ti(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Dy(3) and two equivalent Ti(4) atoms. In the eighth O site, O(8) is bonded to one Dy(3), two equivalent Dy(4), and one Ti(3) atom to form ODy3Ti tetrahedra that share corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(12)Dy4 tetrahedra, corners with three equivalent O(5)Dy4 tetrahedra, and corners with four equivalent O(1)Dy3Ti tetrahedra. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Dy(3), one Dy(4), one Dy(6), and one Ti(1) atom. In the tenth O site, O(10) is bonded to one Dy(5), one Dy(8), and two equivalent Dy(7) atoms to form distorted ODy4 tetrahedra that share  a cornercorner with one O(12)Dy4 tetrahedra, corners with three equivalent O(18)Dy4 tetrahedra, corners with four equivalent O(17)Dy2Ti2 tetrahedra, and  an edgeedge with one O(15)Dy3Ti tetrahedra. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Dy(5), one Dy(7), one Ti(3), and one Ti(4) atom. In the twelfth O site, O(12) is bonded to one Dy(5), one Dy(6), and two equivalent Dy(4) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(2)Dy2Ti2 tetrahedra,  a cornercorner with one O(10)Dy4 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(8)Dy3Ti tetrahedra, corners with four equivalent O(1)Dy3Ti tetrahedra, and  an edgeedge with one O(5)Dy4 tetrahedra. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Dy(1), one Dy(2), one Dy(7), and one Ti(1) atom. In the fourteenth O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Dy(7), one Ti(2), and one Ti(3) atom. In the fifteenth O site, O(15) is bonded to one Dy(1), two equivalent Dy(7), and one Ti(2) atom to form ODy3Ti tetrahedra that share  a cornercorner with one O(5)Dy4 tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with two equivalent O(18)Dy4 tetrahedra,  an edgeedge with one O(10)Dy4 tetrahedra, and edges with two equivalent O(17)Dy2Ti2 tetrahedra. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Dy(5) and two equivalent Ti(4) atoms. In the seventeenth O site, O(17) is bonded to one Dy(7), one Dy(8), one Ti(2), and one Ti(4) atom to form distorted ODy2Ti2 tetrahedra that share  a cornercorner with one O(1)Dy3Ti tetrahedra, corners with two equivalent O(17)Dy2Ti2 tetrahedra, corners with two equivalent O(10)Dy4 tetrahedra,  an edgeedge with one O(15)Dy3Ti tetrahedra, and  an edgeedge with one O(18)Dy4 tetrahedra. In the eighteenth O site, O(18) is bonded to one Dy(2), one Dy(8), and two equivalent Dy(7) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(2)Dy2Ti2 tetrahedra, corners with two equivalent O(15)Dy3Ti tetrahedra, corners with two equivalent O(3)Dy3Ti tetrahedra, corners with three equivalent O(10)Dy4 tetrahedra, and edges with two equivalent O(17)Dy2Ti2 tetrahedra. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Dy(8) and two equivalent Ti(1) atoms.