La11V4O26 crystallizes in the triclinic P-1 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(4), one O(6), one O(7), and one O(8) atom. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(13), one O(5), one O(6), two equivalent O(10), and two equivalent O(11) atoms. In the third La site, La(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(5), one O(7), and two equivalent O(9) atoms. In the fourth La site, La(4) is bonded to one O(1), one O(2), one O(3), one O(7), one O(9), and two equivalent O(12) atoms to form distorted LaO7 pentagonal bipyramids that share  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and  an edgeedge with one La(4)O7 pentagonal bipyramid. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one O(12), one O(13), one O(2), one O(4), one O(7), one O(8), and two equivalent O(3) atoms. In the sixth La site, La(6) is bonded in a 6-coordinate geometry to two equivalent O(13), two equivalent O(2), and two equivalent O(9) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form distorted VO4 tetrahedra that share corners with two equivalent La(4)O7 pentagonal bipyramids. In the second V site, V(2) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form VO4 tetrahedra that share  a cornercorner with one La(4)O7 pentagonal bipyramid. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one La(1), one La(4), and one V(2) atom. In the second O site, O(2) is bonded to one La(4), one La(5), one La(6), and one V(1) atom to form distorted OLa3V tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(12)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(7)La4 tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra,  an edgeedge with one O(13)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the third O site, O(3) is bonded to one La(4), two equivalent La(5), and one V(1) atom to form distorted OLa3V tetrahedra that share  a cornercorner with one O(7)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(2)La3V tetrahedra, corners with two equivalent O(12)La4 tetrahedra, corners with two equivalent O(13)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra, and  an edgeedge with one O(7)La4 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one La(5), and one V(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one La(2), one La(3), and one V(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one La(1), one La(2), and one V(2) atom. In the seventh O site, O(7) is bonded to one La(1), one La(3), one La(4), and one La(5) atom to form OLa4 tetrahedra that share  a cornercorner with one O(3)La3V tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(2)La3V tetrahedra, corners with two equivalent O(12)La4 tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(12)La4 tetrahedra,  an edgeedge with one O(13)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one La(1), one La(5), and one V(1) atom. In the ninth O site, O(9) is bonded to one La(4), one La(6), and two equivalent La(3) atoms to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(3)La3V tetrahedra,  a cornercorner with one O(7)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(12)La4 tetrahedra, corners with two equivalent O(13)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(13)La4 tetrahedra,  an edgeedge with one O(7)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one La(3), two equivalent La(2), and one V(2) atom. In the eleventh O site, O(11) is bonded to one La(1), one La(3), and two equivalent La(2) atoms to form a mixture of edge and corner-sharing OLa4 tetrahedra. In the twelfth O site, O(12) is bonded to one La(1), one La(5), and two equivalent La(4) atoms to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(11)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(7)La4 tetrahedra, corners with two equivalent O(9)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra, and  an edgeedge with one O(7)La4 tetrahedra. In the thirteenth O site, O(13) is bonded to one La(2), one La(3), one La(5), and one La(6) atom to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(12)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(9)La4 tetrahedra, corners with three equivalent O(11)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(7)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra.
La11V4O26 crystallizes in the triclinic P-1 space group. There are six inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(12), one O(4), one O(6), one O(7), and one O(8) atom. The La(1)-O(1) bond length is 2.86 Å. The La(1)-O(11) bond length is 2.44 Å. The La(1)-O(12) bond length is 2.35 Å. The La(1)-O(4) bond length is 2.64 Å. The La(1)-O(6) bond length is 2.53 Å. The La(1)-O(7) bond length is 2.37 Å. The La(1)-O(8) bond length is 2.54 Å. In the second La site, La(2) is bonded in a 7-coordinate geometry to one O(13), one O(5), one O(6), two equivalent O(10), and two equivalent O(11) atoms. The La(2)-O(13) bond length is 2.46 Å. The La(2)-O(5) bond length is 2.54 Å. The La(2)-O(6) bond length is 2.61 Å. There is one shorter (2.52 Å) and one longer (2.82 Å) La(2)-O(10) bond length. There is one shorter (2.29 Å) and one longer (2.50 Å) La(2)-O(11) bond length. In the third La site, La(3) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(13), one O(5), one O(7), and two equivalent O(9) atoms. The La(3)-O(10) bond length is 2.48 Å. The La(3)-O(11) bond length is 2.56 Å. The La(3)-O(13) bond length is 2.62 Å. The La(3)-O(5) bond length is 2.72 Å. The La(3)-O(7) bond length is 2.33 Å. There is one shorter (2.42 Å) and one longer (2.45 Å) La(3)-O(9) bond length. In the fourth La site, La(4) is bonded to one O(1), one O(2), one O(3), one O(7), one O(9), and two equivalent O(12) atoms to form distorted LaO7 pentagonal bipyramids that share  a cornercorner with one V(2)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and  an edgeedge with one La(4)O7 pentagonal bipyramid. The La(4)-O(1) bond length is 2.70 Å. The La(4)-O(2) bond length is 2.48 Å. The La(4)-O(3) bond length is 2.45 Å. The La(4)-O(7) bond length is 2.49 Å. The La(4)-O(9) bond length is 2.39 Å. There is one shorter (2.36 Å) and one longer (2.45 Å) La(4)-O(12) bond length. In the fifth La site, La(5) is bonded in a 8-coordinate geometry to one O(12), one O(13), one O(2), one O(4), one O(7), one O(8), and two equivalent O(3) atoms. The La(5)-O(12) bond length is 2.45 Å. The La(5)-O(13) bond length is 2.40 Å. The La(5)-O(2) bond length is 2.62 Å. The La(5)-O(4) bond length is 2.55 Å. The La(5)-O(7) bond length is 2.40 Å. The La(5)-O(8) bond length is 3.08 Å. There is one shorter (2.55 Å) and one longer (2.70 Å) La(5)-O(3) bond length. In the sixth La site, La(6) is bonded in a 6-coordinate geometry to two equivalent O(13), two equivalent O(2), and two equivalent O(9) atoms. Both La(6)-O(13) bond lengths are 2.42 Å. Both La(6)-O(2) bond lengths are 2.54 Å. Both La(6)-O(9) bond lengths are 2.46 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form distorted VO4 tetrahedra that share corners with two equivalent La(4)O7 pentagonal bipyramids. The V(1)-O(2) bond length is 1.80 Å. The V(1)-O(3) bond length is 1.80 Å. The V(1)-O(5) bond length is 1.80 Å. The V(1)-O(8) bond length is 1.74 Å. In the second V site, V(2) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form VO4 tetrahedra that share  a cornercorner with one La(4)O7 pentagonal bipyramid. The V(2)-O(1) bond length is 1.72 Å. The V(2)-O(10) bond length is 1.77 Å. The V(2)-O(4) bond length is 1.76 Å. The V(2)-O(6) bond length is 1.73 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one La(1), one La(4), and one V(2) atom. In the second O site, O(2) is bonded to one La(4), one La(5), one La(6), and one V(1) atom to form distorted OLa3V tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(12)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(7)La4 tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra,  an edgeedge with one O(13)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the third O site, O(3) is bonded to one La(4), two equivalent La(5), and one V(1) atom to form distorted OLa3V tetrahedra that share  a cornercorner with one O(7)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(2)La3V tetrahedra, corners with two equivalent O(12)La4 tetrahedra, corners with two equivalent O(13)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra, and  an edgeedge with one O(7)La4 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one La(5), and one V(2) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one La(2), one La(3), and one V(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one La(1), one La(2), and one V(2) atom. In the seventh O site, O(7) is bonded to one La(1), one La(3), one La(4), and one La(5) atom to form OLa4 tetrahedra that share  a cornercorner with one O(3)La3V tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(2)La3V tetrahedra, corners with two equivalent O(12)La4 tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(11)La4 tetrahedra,  an edgeedge with one O(12)La4 tetrahedra,  an edgeedge with one O(13)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one La(1), one La(5), and one V(1) atom. In the ninth O site, O(9) is bonded to one La(4), one La(6), and two equivalent La(3) atoms to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(3)La3V tetrahedra,  a cornercorner with one O(7)La4 tetrahedra,  a cornercorner with one O(9)La4 tetrahedra, corners with two equivalent O(11)La4 tetrahedra, corners with two equivalent O(12)La4 tetrahedra, corners with two equivalent O(13)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(13)La4 tetrahedra,  an edgeedge with one O(7)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one La(3), two equivalent La(2), and one V(2) atom. In the eleventh O site, O(11) is bonded to one La(1), one La(3), and two equivalent La(2) atoms to form a mixture of edge and corner-sharing OLa4 tetrahedra. In the twelfth O site, O(12) is bonded to one La(1), one La(5), and two equivalent La(4) atoms to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(11)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(7)La4 tetrahedra, corners with two equivalent O(9)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(3)La3V tetrahedra,  an edgeedge with one O(12)La4 tetrahedra, and  an edgeedge with one O(7)La4 tetrahedra. In the thirteenth O site, O(13) is bonded to one La(2), one La(3), one La(5), and one La(6) atom to form OLa4 tetrahedra that share  a cornercorner with one O(2)La3V tetrahedra,  a cornercorner with one O(12)La4 tetrahedra,  a cornercorner with one O(13)La4 tetrahedra, corners with two equivalent O(3)La3V tetrahedra, corners with two equivalent O(9)La4 tetrahedra, corners with three equivalent O(11)La4 tetrahedra,  an edgeedge with one O(2)La3V tetrahedra,  an edgeedge with one O(7)La4 tetrahedra, and  an edgeedge with one O(9)La4 tetrahedra.