V2Cd(P2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form VO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Cd(1)O6 octahedra. In the second V site, V(2) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form VO6 octahedra that share corners with two equivalent Cd(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with four equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CdO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles are 61°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Cd(1)O6 octahedra, corners with two equivalent V(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-59°. In the second P site, P(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent Cd(1)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-60°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one V(1), one Cd(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cd(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one V(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one V(2), one Cd(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one V(2) and one P(1) atom.
V2Cd(P2O7)2 crystallizes in the triclinic P-1 space group. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form VO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Cd(1)O6 octahedra. Both V(1)-O(2) bond lengths are 2.09 Å. Both V(1)-O(3) bond lengths are 2.11 Å. Both V(1)-O(4) bond lengths are 1.96 Å. In the second V site, V(2) is bonded to two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms to form VO6 octahedra that share corners with two equivalent Cd(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with four equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. Both V(2)-O(5) bond lengths are 1.98 Å. Both V(2)-O(6) bond lengths are 2.22 Å. Both V(2)-O(7) bond lengths are 1.96 Å. Cd(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CdO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent V(1)O6 octahedra. The corner-sharing octahedral tilt angles are 61°. Both Cd(1)-O(2) bond lengths are 2.33 Å. Both Cd(1)-O(3) bond lengths are 2.67 Å. Both Cd(1)-O(6) bond lengths are 2.40 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Cd(1)O6 octahedra, corners with two equivalent V(1)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-59°. The P(1)-O(1) bond length is 1.59 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.52 Å. The P(1)-O(7) bond length is 1.50 Å. In the second P site, P(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent V(2)O6 octahedra, corners with two equivalent Cd(1)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-60°. The P(2)-O(1) bond length is 1.61 Å. The P(2)-O(3) bond length is 1.55 Å. The P(2)-O(5) bond length is 1.51 Å. The P(2)-O(6) bond length is 1.55 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one V(1), one Cd(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one V(1), one Cd(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one V(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one V(2), one Cd(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one V(2) and one P(1) atom.