BaZnV2O7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(7), two equivalent O(1), and two equivalent O(6) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one V(2)O4 tetrahedra and corners with two equivalent Zn(1)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with three equivalent Zn(1)O5 trigonal bipyramids. Zn(1) is bonded to one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form distorted ZnO5 trigonal bipyramids that share corners with two equivalent V(1)O4 tetrahedra, corners with three equivalent V(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one V(2), and two equivalent Zn(1) atoms. In the second O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one V(1), and one Zn(1) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Ba(1), one V(1), and one Zn(1) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one V(1) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to one V(1) and one V(2) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1) and one V(2) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one V(2), and one Zn(1) atom.
BaZnV2O7 crystallizes in the monoclinic P2_1/c space group. Ba(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(7), two equivalent O(1), and two equivalent O(6) atoms. The Ba(1)-O(3) bond length is 2.77 Å. The Ba(1)-O(4) bond length is 2.77 Å. The Ba(1)-O(5) bond length is 3.02 Å. The Ba(1)-O(7) bond length is 2.89 Å. There is one shorter (2.85 Å) and one longer (2.87 Å) Ba(1)-O(1) bond length. There is one shorter (2.87 Å) and one longer (3.04 Å) Ba(1)-O(6) bond length. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(6), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one V(2)O4 tetrahedra and corners with two equivalent Zn(1)O5 trigonal bipyramids. The V(1)-O(1) bond length is 1.69 Å. The V(1)-O(2) bond length is 1.82 Å. The V(1)-O(6) bond length is 1.76 Å. The V(1)-O(7) bond length is 1.72 Å. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with three equivalent Zn(1)O5 trigonal bipyramids. The V(2)-O(2) bond length is 1.82 Å. The V(2)-O(3) bond length is 1.68 Å. The V(2)-O(4) bond length is 1.73 Å. The V(2)-O(5) bond length is 1.77 Å. Zn(1) is bonded to one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form distorted ZnO5 trigonal bipyramids that share corners with two equivalent V(1)O4 tetrahedra, corners with three equivalent V(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O5 trigonal bipyramid. The Zn(1)-O(4) bond length is 1.99 Å. The Zn(1)-O(6) bond length is 2.01 Å. The Zn(1)-O(7) bond length is 2.11 Å. There is one shorter (2.03 Å) and one longer (2.34 Å) Zn(1)-O(5) bond length. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one V(2), and two equivalent Zn(1) atoms. In the second O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one V(1), and one Zn(1) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Ba(1), one V(1), and one Zn(1) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Ba(1) and one V(1) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to one V(1) and one V(2) atom. In the sixth O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1) and one V(2) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Ba(1), one V(2), and one Zn(1) atom.