Mo6CdP4O25 crystallizes in the monoclinic P2_1/c space group. There are six inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  an edgeedge with one Mo(2)O5 square pyramid, and  an edgeedge with one Mo(6)O5 square pyramid. The corner-sharing octahedral tilt angles are 48°. The Mo(1)-O(1) bond length is 1.93 Å. The Mo(1)-O(2) bond length is 1.97 Å. The Mo(1)-O(3) bond length is 2.08 Å. The Mo(1)-O(4) bond length is 2.09 Å. The Mo(1)-O(5) bond length is 2.32 Å. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(6), one O(7), and one O(8) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  an edgeedge with one Mo(1)O5 square pyramid, and  an edgeedge with one Mo(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 46°. The Mo(2)-O(1) bond length is 1.94 Å. The Mo(2)-O(2) bond length is 1.98 Å. The Mo(2)-O(6) bond length is 2.10 Å. The Mo(2)-O(7) bond length is 2.07 Å. The Mo(2)-O(8) bond length is 2.29 Å. In the third Mo site, Mo(3) is bonded to one O(10), one O(11), one O(6), one O(8), and one O(9) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  an edgeedge with one Mo(2)O5 square pyramid, and  an edgeedge with one Mo(4)O5 square pyramid. The corner-sharing octahedral tilt angles are 48°. The Mo(3)-O(10) bond length is 1.93 Å. The Mo(3)-O(11) bond length is 2.07 Å. The Mo(3)-O(6) bond length is 2.13 Å. The Mo(3)-O(8) bond length is 2.28 Å. The Mo(3)-O(9) bond length is 1.98 Å. In the fourth Mo site, Mo(4) is bonded to one O(10), one O(12), one O(13), one O(14), and one O(9) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Mo(3)O5 square pyramid, and  an edgeedge with one Mo(5)O5 square pyramid. The corner-sharing octahedral tilt angles are 49°. The Mo(4)-O(10) bond length is 1.93 Å. The Mo(4)-O(12) bond length is 2.26 Å. The Mo(4)-O(13) bond length is 2.09 Å. The Mo(4)-O(14) bond length is 2.10 Å. The Mo(4)-O(9) bond length is 1.98 Å. In the fifth Mo site, Mo(5) is bonded to one O(12), one O(14), one O(15), one O(16), and one O(17) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Mo(4)O5 square pyramid, and  an edgeedge with one Mo(6)O5 square pyramid. The corner-sharing octahedral tilt angles are 47°. The Mo(5)-O(12) bond length is 2.29 Å. The Mo(5)-O(14) bond length is 2.13 Å. The Mo(5)-O(15) bond length is 1.96 Å. The Mo(5)-O(16) bond length is 2.06 Å. The Mo(5)-O(17) bond length is 1.96 Å. In the sixth Mo site, Mo(6) is bonded to one O(15), one O(17), one O(18), one O(4), and one O(5) atom to form distorted MoO5 square pyramids that share  a cornercorner with one Cd(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  an edgeedge with one Mo(1)O5 square pyramid, and  an edgeedge with one Mo(5)O5 square pyramid. The corner-sharing octahedral tilt angles are 48°. The Mo(6)-O(15) bond length is 1.93 Å. The Mo(6)-O(17) bond length is 1.97 Å. The Mo(6)-O(18) bond length is 2.05 Å. The Mo(6)-O(4) bond length is 2.12 Å. The Mo(6)-O(5) bond length is 2.29 Å. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent O(17), two equivalent O(2), and two equivalent O(9) atoms to form CdO6 octahedra that share corners with two equivalent Mo(1)O5 square pyramids, corners with two equivalent Mo(2)O5 square pyramids, corners with two equivalent Mo(3)O5 square pyramids, corners with two equivalent Mo(4)O5 square pyramids, corners with two equivalent Mo(5)O5 square pyramids, and corners with two equivalent Mo(6)O5 square pyramids. Both Cd(1)-O(17) bond lengths are 2.26 Å. Both Cd(1)-O(2) bond lengths are 2.28 Å. Both Cd(1)-O(9) bond lengths are 2.28 Å. In the second Cd site, Cd(2) is bonded to two equivalent O(20), two equivalent O(23), and two equivalent O(24) atoms to form CdO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. Both Cd(2)-O(20) bond lengths are 2.23 Å. Both Cd(2)-O(23) bond lengths are 2.30 Å. Both Cd(2)-O(24) bond lengths are 2.31 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(12), one O(19), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mo(1)O5 square pyramid,  a cornercorner with one Mo(2)O5 square pyramid,  a cornercorner with one Mo(3)O5 square pyramid,  a cornercorner with one Mo(4)O5 square pyramid,  a cornercorner with one Mo(5)O5 square pyramid, and  a cornercorner with one Mo(6)O5 square pyramid. The P(1)-O(12) bond length is 1.55 Å. The P(1)-O(19) bond length is 1.51 Å. The P(1)-O(5) bond length is 1.54 Å. The P(1)-O(8) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(18), one O(20), one O(21), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Cd(2)O6 octahedra,  a cornercorner with one Mo(1)O5 square pyramid, and  a cornercorner with one Mo(6)O5 square pyramid. The corner-sharing octahedral tilt angles are 51°. The P(2)-O(18) bond length is 1.54 Å. The P(2)-O(20) bond length is 1.49 Å. The P(2)-O(21) bond length is 1.59 Å. The P(2)-O(3) bond length is 1.52 Å. In the third P site, P(3) is bonded to one O(11), one O(22), one O(23), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Cd(2)O6 octahedra,  a cornercorner with one Mo(2)O5 square pyramid, and  a cornercorner with one Mo(3)O5 square pyramid. The corner-sharing octahedral tilt angles are 15°. The P(3)-O(11) bond length is 1.53 Å. The P(3)-O(22) bond length is 1.58 Å. The P(3)-O(23) bond length is 1.48 Å. The P(3)-O(7) bond length is 1.51 Å. In the fourth P site, P(4) is bonded to one O(13), one O(16), one O(24), and one O(25) atom to form PO4 tetrahedra that share  a cornercorner with one Cd(2)O6 octahedra,  a cornercorner with one Mo(4)O5 square pyramid, and  a cornercorner with one Mo(5)O5 square pyramid. The corner-sharing octahedral tilt angles are 24°. The P(4)-O(13) bond length is 1.53 Å. The P(4)-O(16) bond length is 1.53 Å. The P(4)-O(24) bond length is 1.49 Å. The P(4)-O(25) bond length is 1.60 Å. There are twenty-five inequivalent O sites. In the first O site, O(1) is bonded in an L-shaped geometry to one Mo(1) and one Mo(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Mo(1), one Mo(2), and one Cd(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Mo(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(6) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Mo(1), one Mo(6), and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mo(2) and one Mo(3) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Mo(2) and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Mo(2), one Mo(3), and one P(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Mo(3), one Mo(4), and one Cd(1) atom. In the tenth O site, O(10) is bonded in an L-shaped geometry to one Mo(3) and one Mo(4) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Mo(3) and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Mo(4), one Mo(5), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Mo(4) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Mo(4) and one Mo(5) atom. In the fifteenth O site, O(15) is bonded in an L-shaped geometry to one Mo(5) and one Mo(6) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Mo(5) and one P(4) atom. In the seventeenth O site, O(17) is bonded in a distorted T-shaped geometry to one Mo(5), one Mo(6), and one Cd(1) atom. In the eighteenth O site, O(18) is bonded in a distorted single-bond geometry to one Mo(6) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a single-bond geometry to one P(1) atom. In the twentieth O site, O(20) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one P(2) atom. In the twenty-first O site, O(21) is bonded in a single-bond geometry to one P(2) atom. In the twenty-second O site, O(22) is bonded in a single-bond geometry to one P(3) atom. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one Cd(2) and one P(3) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Cd(2) and one P(4) atom. In the twenty-fifth O site, O(25) is bonded in a single-bond geometry to one P(4) atom. Linkers: 16 [O]P([O])([O])=O. Metal clusters: 4 [Cd] ,24 [Mo]. The MOF has largest included sphere 6.03 A, density 2.27 g/cm3, surface area 1856.48 m2/g, accessible volume 0.22 cm3/g