BaU2V2O12 crystallizes in the monoclinic Pc space group. Ba(1) is bonded in a 11-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(6), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(3), one O(5), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(2)O7 pentagonal bipyramids,  a cornercorner with one V(1)O5 trigonal bipyramid,  a cornercorner with one V(2)O5 trigonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. In the second U site, U(2) is bonded to one O(10), one O(11), one O(12), one O(2), one O(4), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(1)O7 pentagonal bipyramids,  a cornercorner with one V(1)O5 trigonal bipyramid,  a cornercorner with one V(2)O5 trigonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(3), one O(4), one O(7), and one O(9) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(2)O7 pentagonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. In the second V site, V(2) is bonded to one O(10), one O(12), one O(3), one O(4), and one O(8) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(2)O7 pentagonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(1) and one U(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ba(1) and one U(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), one V(1), and one V(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one U(2), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one U(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Ba(1) and one U(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one V(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Ba(1) and one V(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(1), one U(1), one U(2), and one V(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one U(1), one U(2), and one V(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), one U(2), and one V(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one V(2) atom.
BaU2V2O12 crystallizes in the monoclinic Pc space group. Ba(1) is bonded in a 11-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(6), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. The Ba(1)-O(1) bond length is 2.79 Å. The Ba(1)-O(11) bond length is 3.35 Å. The Ba(1)-O(2) bond length is 2.74 Å. The Ba(1)-O(3) bond length is 3.07 Å. The Ba(1)-O(6) bond length is 3.28 Å. The Ba(1)-O(8) bond length is 2.88 Å. The Ba(1)-O(9) bond length is 2.90 Å. There is one shorter (2.87 Å) and one longer (3.51 Å) Ba(1)-O(5) bond length. There is one shorter (2.80 Å) and one longer (3.12 Å) Ba(1)-O(7) bond length. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(3), one O(5), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(2)O7 pentagonal bipyramids,  a cornercorner with one V(1)O5 trigonal bipyramid,  a cornercorner with one V(2)O5 trigonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. The U(1)-O(1) bond length is 1.82 Å. The U(1)-O(10) bond length is 2.29 Å. The U(1)-O(11) bond length is 2.34 Å. The U(1)-O(12) bond length is 2.29 Å. The U(1)-O(3) bond length is 2.30 Å. The U(1)-O(5) bond length is 1.84 Å. The U(1)-O(9) bond length is 2.40 Å. In the second U site, U(2) is bonded to one O(10), one O(11), one O(12), one O(2), one O(4), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(1)O7 pentagonal bipyramids,  a cornercorner with one V(1)O5 trigonal bipyramid,  a cornercorner with one V(2)O5 trigonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. The U(2)-O(10) bond length is 2.33 Å. The U(2)-O(11) bond length is 2.36 Å. The U(2)-O(12) bond length is 2.37 Å. The U(2)-O(2) bond length is 1.82 Å. The U(2)-O(4) bond length is 2.33 Å. The U(2)-O(6) bond length is 1.80 Å. The U(2)-O(9) bond length is 2.37 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(3), one O(4), one O(7), and one O(9) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(2)O7 pentagonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. The V(1)-O(11) bond length is 1.80 Å. The V(1)-O(3) bond length is 1.90 Å. The V(1)-O(4) bond length is 1.91 Å. The V(1)-O(7) bond length is 1.63 Å. The V(1)-O(9) bond length is 1.83 Å. In the second V site, V(2) is bonded to one O(10), one O(12), one O(3), one O(4), and one O(8) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(2)O7 pentagonal bipyramid,  an edgeedge with one U(1)O7 pentagonal bipyramid,  an edgeedge with one U(2)O7 pentagonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. The V(2)-O(10) bond length is 1.84 Å. The V(2)-O(12) bond length is 1.80 Å. The V(2)-O(3) bond length is 1.96 Å. The V(2)-O(4) bond length is 1.89 Å. The V(2)-O(8) bond length is 1.62 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(1) and one U(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ba(1) and one U(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), one V(1), and one V(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one U(2), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one U(1) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Ba(1) and one U(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one V(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Ba(1) and one V(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(1), one U(1), one U(2), and one V(1) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one U(1), one U(2), and one V(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), one U(2), and one V(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one V(2) atom.