Yb4O13Cl2 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one O(12), one O(13), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted YbO7 pentagonal bipyramids that share  a cornercorner with one O(6)Yb3O tetrahedra,  a cornercorner with one O(8)Yb3O tetrahedra, and  a cornercorner with one O(5)Yb3O trigonal pyramid. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the third Yb site, Yb(3) is bonded in a 8-coordinate geometry to one O(1), one O(5), one O(7), one O(9), two equivalent O(11), and two equivalent O(3) atoms. In the fourth Yb site, Yb(4) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(6), one O(8), two equivalent O(12), and two equivalent O(4) atoms. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Yb(2), one Yb(3), and one Cl(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Yb(2), one Yb(4), and one O(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Yb(1) and two equivalent Yb(3) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Yb(2), two equivalent Yb(4), and one O(2) atom. In the fifth O site, O(5) is bonded to one Yb(1), one Yb(2), one Yb(3), and one O(7) atom to form distorted OYb3O trigonal pyramids that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid, corners with two equivalent O(6)Yb3O tetrahedra, corners with two equivalent O(8)Yb3O tetrahedra, and  a cornercorner with one O(12)Yb3Cl trigonal pyramid. In the sixth O site, O(6) is bonded to one Yb(1), one Yb(2), one Yb(4), and one O(8) atom to form distorted OYb3O tetrahedra that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid,  a cornercorner with one O(12)Yb3Cl trigonal pyramid, corners with two equivalent O(5)Yb3O trigonal pyramids,  an edgeedge with one O(12)Yb3Cl trigonal pyramid, and  a faceface with one O(8)Yb3O tetrahedra. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Yb(3), and one O(5) atom. In the eighth O site, O(8) is bonded to one Yb(1), one Yb(2), one Yb(4), and one O(6) atom to form distorted OYb3O tetrahedra that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid,  a cornercorner with one O(12)Yb3Cl trigonal pyramid, corners with two equivalent O(5)Yb3O trigonal pyramids,  an edgeedge with one O(12)Yb3Cl trigonal pyramid, and  a faceface with one O(6)Yb3O tetrahedra. In the ninth O site, O(9) is bonded in an L-shaped geometry to one Yb(3) and one O(11) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Yb(4) and one Cl(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(3), and one O(9) atom. In the twelfth O site, O(12) is bonded to one Yb(1), two equivalent Yb(4), and one Cl(2) atom to form OYb3Cl trigonal pyramids that share  a cornercorner with one O(6)Yb3O tetrahedra,  a cornercorner with one O(8)Yb3O tetrahedra,  a cornercorner with one O(5)Yb3O trigonal pyramid, corners with two equivalent O(12)Yb3Cl trigonal pyramids,  an edgeedge with one O(6)Yb3O tetrahedra, and  an edgeedge with one O(8)Yb3O tetrahedra. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Yb(1) and one Cl(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a water-like geometry to one O(1) and one O(13) atom. In the second Cl site, Cl(2) is bonded in a distorted bent 150 degrees geometry to one O(10) and one O(12) atom.
Yb4O13Cl2 crystallizes in the monoclinic P2_1 space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to one O(12), one O(13), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted YbO7 pentagonal bipyramids that share  a cornercorner with one O(6)Yb3O tetrahedra,  a cornercorner with one O(8)Yb3O tetrahedra, and  a cornercorner with one O(5)Yb3O trigonal pyramid. The Yb(1)-O(12) bond length is 2.43 Å. The Yb(1)-O(13) bond length is 2.41 Å. The Yb(1)-O(3) bond length is 2.29 Å. The Yb(1)-O(5) bond length is 2.33 Å. The Yb(1)-O(6) bond length is 2.38 Å. The Yb(1)-O(7) bond length is 2.33 Å. The Yb(1)-O(8) bond length is 2.34 Å. In the second Yb site, Yb(2) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(2), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Yb(2)-O(1) bond length is 2.38 Å. The Yb(2)-O(11) bond length is 2.52 Å. The Yb(2)-O(2) bond length is 2.30 Å. The Yb(2)-O(4) bond length is 2.34 Å. The Yb(2)-O(5) bond length is 2.35 Å. The Yb(2)-O(6) bond length is 2.25 Å. The Yb(2)-O(7) bond length is 2.28 Å. The Yb(2)-O(8) bond length is 2.27 Å. In the third Yb site, Yb(3) is bonded in a 8-coordinate geometry to one O(1), one O(5), one O(7), one O(9), two equivalent O(11), and two equivalent O(3) atoms. The Yb(3)-O(1) bond length is 2.37 Å. The Yb(3)-O(5) bond length is 2.41 Å. The Yb(3)-O(7) bond length is 2.34 Å. The Yb(3)-O(9) bond length is 2.40 Å. There is one shorter (2.36 Å) and one longer (2.65 Å) Yb(3)-O(11) bond length. There is one shorter (2.30 Å) and one longer (2.36 Å) Yb(3)-O(3) bond length. In the fourth Yb site, Yb(4) is bonded in a 7-coordinate geometry to one O(10), one O(2), one O(6), one O(8), two equivalent O(12), and two equivalent O(4) atoms. The Yb(4)-O(10) bond length is 2.26 Å. The Yb(4)-O(2) bond length is 2.38 Å. The Yb(4)-O(6) bond length is 2.31 Å. The Yb(4)-O(8) bond length is 2.29 Å. There is one shorter (2.37 Å) and one longer (2.41 Å) Yb(4)-O(12) bond length. There is one shorter (2.37 Å) and one longer (3.06 Å) Yb(4)-O(4) bond length. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Yb(2), one Yb(3), and one Cl(1) atom. The O(1)-Cl(1) bond length is 1.59 Å. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Yb(2), one Yb(4), and one O(4) atom. The O(2)-O(4) bond length is 1.35 Å. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Yb(1) and two equivalent Yb(3) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Yb(2), two equivalent Yb(4), and one O(2) atom. In the fifth O site, O(5) is bonded to one Yb(1), one Yb(2), one Yb(3), and one O(7) atom to form distorted OYb3O trigonal pyramids that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid, corners with two equivalent O(6)Yb3O tetrahedra, corners with two equivalent O(8)Yb3O tetrahedra, and  a cornercorner with one O(12)Yb3Cl trigonal pyramid. The O(5)-O(7) bond length is 1.44 Å. In the sixth O site, O(6) is bonded to one Yb(1), one Yb(2), one Yb(4), and one O(8) atom to form distorted OYb3O tetrahedra that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid,  a cornercorner with one O(12)Yb3Cl trigonal pyramid, corners with two equivalent O(5)Yb3O trigonal pyramids,  an edgeedge with one O(12)Yb3Cl trigonal pyramid, and  a faceface with one O(8)Yb3O tetrahedra. The O(6)-O(8) bond length is 1.45 Å. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Yb(1), one Yb(2), one Yb(3), and one O(5) atom. In the eighth O site, O(8) is bonded to one Yb(1), one Yb(2), one Yb(4), and one O(6) atom to form distorted OYb3O tetrahedra that share  a cornercorner with one Yb(1)O7 pentagonal bipyramid,  a cornercorner with one O(12)Yb3Cl trigonal pyramid, corners with two equivalent O(5)Yb3O trigonal pyramids,  an edgeedge with one O(12)Yb3Cl trigonal pyramid, and  a faceface with one O(6)Yb3O tetrahedra. In the ninth O site, O(9) is bonded in an L-shaped geometry to one Yb(3) and one O(11) atom. The O(9)-O(11) bond length is 1.31 Å. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Yb(4) and one Cl(2) atom. The O(10)-Cl(2) bond length is 1.63 Å. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Yb(2), two equivalent Yb(3), and one O(9) atom. In the twelfth O site, O(12) is bonded to one Yb(1), two equivalent Yb(4), and one Cl(2) atom to form OYb3Cl trigonal pyramids that share  a cornercorner with one O(6)Yb3O tetrahedra,  a cornercorner with one O(8)Yb3O tetrahedra,  a cornercorner with one O(5)Yb3O trigonal pyramid, corners with two equivalent O(12)Yb3Cl trigonal pyramids,  an edgeedge with one O(6)Yb3O tetrahedra, and  an edgeedge with one O(8)Yb3O tetrahedra. The O(12)-Cl(2) bond length is 1.89 Å. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Yb(1) and one Cl(1) atom. The O(13)-Cl(1) bond length is 1.54 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a water-like geometry to one O(1) and one O(13) atom. In the second Cl site, Cl(2) is bonded in a distorted bent 150 degrees geometry to one O(10) and one O(12) atom.