CdV3O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. Cd(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one V(1) and one Cd(1) atom. In the second O site, O(4) is bonded in a distorted single-bond geometry to one V(2) and one Cd(1) atom. In the third O site, O(1) is bonded in a 4-coordinate geometry to one V(2), two equivalent V(1), and one Cd(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to one V(2), two equivalent V(1), and one Cd(1) atom.
CdV3O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(2) atoms. The V(1)-O(3) bond length is 1.66 Å. There is one shorter (1.98 Å) and one longer (2.00 Å) V(1)-O(1) bond length. There is one shorter (1.99 Å) and one longer (2.00 Å) V(1)-O(2) bond length. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(2) atoms. The V(2)-O(4) bond length is 1.66 Å. Both V(2)-O(1) bond lengths are 1.99 Å. Both V(2)-O(2) bond lengths are 2.01 Å. Cd(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Cd(1)-O(4) bond length is 2.50 Å. Both Cd(1)-O(1) bond lengths are 2.56 Å. Both Cd(1)-O(2) bond lengths are 2.42 Å. Both Cd(1)-O(3) bond lengths are 2.24 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a bent 150 degrees geometry to one V(1) and one Cd(1) atom. In the second O site, O(4) is bonded in a distorted single-bond geometry to one V(2) and one Cd(1) atom. In the third O site, O(1) is bonded in a 4-coordinate geometry to one V(2), two equivalent V(1), and one Cd(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to one V(2), two equivalent V(1), and one Cd(1) atom.