YTi3Se2O8Cl crystallizes in the triclinic P1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(14), one O(16), one O(2), one O(8), and one O(9) atom to form distorted YO6 pentagonal pyramids that share  a cornercorner with one Ti(2)ClO4 trigonal bipyramid,  a cornercorner with one Ti(5)SeO4 trigonal bipyramid, and  an edgeedge with one Ti(5)SeO4 trigonal bipyramid. In the second Y site, Y(2) is bonded to one O(10), one O(12), one O(15), one O(3), one O(5), one O(6), and one O(7) atom to form distorted YO7 pentagonal bipyramids that share  a cornercorner with one Ti(4)ClO4 trigonal bipyramid,  an edgeedge with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Ti(4)ClO4 trigonal bipyramid. There are six inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 3-coordinate geometry to one Se(1), one O(1), one O(13), one O(4), one O(7), and one Cl(2) atom. In the second Ti site, Ti(2) is bonded to one O(11), one O(12), one O(14), one O(5), and one Cl(1) atom to form distorted TiClO4 trigonal bipyramids that share  a cornercorner with one Y(1)O6 pentagonal pyramid,  a cornercorner with one Ti(4)ClO4 trigonal bipyramid,  a cornercorner with one Ti(5)SeO4 trigonal bipyramid, and  an edgeedge with one Y(2)O7 pentagonal bipyramid. In the third Ti site, Ti(3) is bonded in a 3-coordinate geometry to one Se(1), one O(10), one O(7), one O(8), and one Cl(2) atom. In the fourth Ti site, Ti(4) is bonded to one O(15), one O(3), one O(4), one O(7), and one Cl(1) atom to form distorted TiClO4 trigonal bipyramids that share  a cornercorner with one Y(2)O7 pentagonal bipyramid,  a cornercorner with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Y(2)O7 pentagonal bipyramid. In the fifth Ti site, Ti(5) is bonded to one Se(3), one O(1), one O(11), one O(16), and one O(2) atom to form distorted TiSeO4 trigonal bipyramids that share  a cornercorner with one Y(1)O6 pentagonal pyramid,  a cornercorner with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Y(1)O6 pentagonal pyramid. In the sixth Ti site, Ti(6) is bonded in a 5-coordinate geometry to one Se(3), one O(11), one O(12), one O(6), and one O(9) atom. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a 3-coordinate geometry to one Ti(1), one Ti(3), and one Se(3) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(13), and one O(2) atom. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one Ti(5), one Ti(6), and one Se(1) atom. In the fourth Se site, Se(4) is bonded in a water-like geometry to one O(5) and one O(6) atom. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Y(1), one Ti(1), and one Ti(5) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Ti(5), and one Se(2) atom. In the third O site, O(3) is bonded in a water-like geometry to one Y(2) and one Ti(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ti(1) and one Ti(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Y(2), one Ti(2), and one Se(4) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Y(2), one Ti(6), and one Se(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Y(2), one Ti(1), one Ti(3), and one Ti(4) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one Ti(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one Ti(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Y(2), one Ti(3), and one Se(2) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ti(2), one Ti(5), and one Ti(6) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Y(2), one Ti(2), and one Ti(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ti(1) and one Se(2) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Y(1) and one Ti(2) atom. In the fifteenth O site, O(15) is bonded in a water-like geometry to one Y(2) and one Ti(4) atom. In the sixteenth O site, O(16) is bonded in a water-like geometry to one Y(1) and one Ti(5) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 120 degrees geometry to one Ti(2) and one Ti(4) atom. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to one Ti(1) and one Ti(3) atom.
YTi3Se2O8Cl crystallizes in the triclinic P1 space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), one O(14), one O(16), one O(2), one O(8), and one O(9) atom to form distorted YO6 pentagonal pyramids that share  a cornercorner with one Ti(2)ClO4 trigonal bipyramid,  a cornercorner with one Ti(5)SeO4 trigonal bipyramid, and  an edgeedge with one Ti(5)SeO4 trigonal bipyramid. The Y(1)-O(1) bond length is 2.46 Å. The Y(1)-O(14) bond length is 2.25 Å. The Y(1)-O(16) bond length is 2.26 Å. The Y(1)-O(2) bond length is 2.46 Å. The Y(1)-O(8) bond length is 2.35 Å. The Y(1)-O(9) bond length is 2.23 Å. In the second Y site, Y(2) is bonded to one O(10), one O(12), one O(15), one O(3), one O(5), one O(6), and one O(7) atom to form distorted YO7 pentagonal bipyramids that share  a cornercorner with one Ti(4)ClO4 trigonal bipyramid,  an edgeedge with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Ti(4)ClO4 trigonal bipyramid. The Y(2)-O(10) bond length is 2.46 Å. The Y(2)-O(12) bond length is 2.43 Å. The Y(2)-O(15) bond length is 2.20 Å. The Y(2)-O(3) bond length is 2.26 Å. The Y(2)-O(5) bond length is 2.42 Å. The Y(2)-O(6) bond length is 2.42 Å. The Y(2)-O(7) bond length is 2.62 Å. There are six inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 3-coordinate geometry to one Se(1), one O(1), one O(13), one O(4), one O(7), and one Cl(2) atom. The Ti(1)-Se(1) bond length is 2.91 Å. The Ti(1)-O(1) bond length is 1.83 Å. The Ti(1)-O(13) bond length is 1.92 Å. The Ti(1)-O(4) bond length is 1.72 Å. The Ti(1)-O(7) bond length is 2.71 Å. The Ti(1)-Cl(2) bond length is 2.39 Å. In the second Ti site, Ti(2) is bonded to one O(11), one O(12), one O(14), one O(5), and one Cl(1) atom to form distorted TiClO4 trigonal bipyramids that share  a cornercorner with one Y(1)O6 pentagonal pyramid,  a cornercorner with one Ti(4)ClO4 trigonal bipyramid,  a cornercorner with one Ti(5)SeO4 trigonal bipyramid, and  an edgeedge with one Y(2)O7 pentagonal bipyramid. The Ti(2)-O(11) bond length is 1.99 Å. The Ti(2)-O(12) bond length is 1.90 Å. The Ti(2)-O(14) bond length is 1.72 Å. The Ti(2)-O(5) bond length is 2.14 Å. The Ti(2)-Cl(1) bond length is 2.45 Å. In the third Ti site, Ti(3) is bonded in a 3-coordinate geometry to one Se(1), one O(10), one O(7), one O(8), and one Cl(2) atom. The Ti(3)-Se(1) bond length is 2.74 Å. The Ti(3)-O(10) bond length is 2.00 Å. The Ti(3)-O(7) bond length is 1.82 Å. The Ti(3)-O(8) bond length is 1.72 Å. The Ti(3)-Cl(2) bond length is 2.49 Å. In the fourth Ti site, Ti(4) is bonded to one O(15), one O(3), one O(4), one O(7), and one Cl(1) atom to form distorted TiClO4 trigonal bipyramids that share  a cornercorner with one Y(2)O7 pentagonal bipyramid,  a cornercorner with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Y(2)O7 pentagonal bipyramid. The Ti(4)-O(15) bond length is 1.77 Å. The Ti(4)-O(3) bond length is 1.79 Å. The Ti(4)-O(4) bond length is 2.11 Å. The Ti(4)-O(7) bond length is 2.12 Å. The Ti(4)-Cl(1) bond length is 2.42 Å. In the fifth Ti site, Ti(5) is bonded to one Se(3), one O(1), one O(11), one O(16), and one O(2) atom to form distorted TiSeO4 trigonal bipyramids that share  a cornercorner with one Y(1)O6 pentagonal pyramid,  a cornercorner with one Ti(2)ClO4 trigonal bipyramid, and  an edgeedge with one Y(1)O6 pentagonal pyramid. The Ti(5)-Se(3) bond length is 2.61 Å. The Ti(5)-O(1) bond length is 1.94 Å. The Ti(5)-O(11) bond length is 1.91 Å. The Ti(5)-O(16) bond length is 1.71 Å. The Ti(5)-O(2) bond length is 2.09 Å. In the sixth Ti site, Ti(6) is bonded in a 5-coordinate geometry to one Se(3), one O(11), one O(12), one O(6), and one O(9) atom. The Ti(6)-Se(3) bond length is 2.60 Å. The Ti(6)-O(11) bond length is 2.12 Å. The Ti(6)-O(12) bond length is 1.95 Å. The Ti(6)-O(6) bond length is 1.99 Å. The Ti(6)-O(9) bond length is 1.73 Å. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a 3-coordinate geometry to one Ti(1), one Ti(3), and one Se(3) atom. The Se(1)-Se(3) bond length is 2.41 Å. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(10), one O(13), and one O(2) atom. The Se(2)-O(10) bond length is 1.78 Å. The Se(2)-O(13) bond length is 1.72 Å. The Se(2)-O(2) bond length is 1.79 Å. In the third Se site, Se(3) is bonded in a 3-coordinate geometry to one Ti(5), one Ti(6), and one Se(1) atom. In the fourth Se site, Se(4) is bonded in a water-like geometry to one O(5) and one O(6) atom. The Se(4)-O(5) bond length is 1.79 Å. The Se(4)-O(6) bond length is 1.84 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Y(1), one Ti(1), and one Ti(5) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Y(1), one Ti(5), and one Se(2) atom. In the third O site, O(3) is bonded in a water-like geometry to one Y(2) and one Ti(4) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ti(1) and one Ti(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Y(2), one Ti(2), and one Se(4) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Y(2), one Ti(6), and one Se(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Y(2), one Ti(1), one Ti(3), and one Ti(4) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one Ti(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one Ti(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Y(2), one Ti(3), and one Se(2) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ti(2), one Ti(5), and one Ti(6) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Y(2), one Ti(2), and one Ti(6) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Ti(1) and one Se(2) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Y(1) and one Ti(2) atom. In the fifteenth O site, O(15) is bonded in a water-like geometry to one Y(2) and one Ti(4) atom. In the sixteenth O site, O(16) is bonded in a water-like geometry to one Y(1) and one Ti(5) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a bent 120 degrees geometry to one Ti(2) and one Ti(4) atom. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to one Ti(1) and one Ti(3) atom.