Sr2CdWO6 crystallizes in the orthorhombic Pmmn space group. Sr(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(1), and four equivalent O(2) atoms. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form WO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-12°. Cd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CdO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-12°. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sr(1), one W(1), and one Cd(1) atom to form distorted OSr3CdW square pyramids that share corners with four equivalent O(2)Sr4CdW octahedra, corners with four equivalent O(1)Sr3CdW square pyramids, edges with two equivalent O(1)Sr3CdW square pyramids, and faces with four equivalent O(2)Sr4CdW octahedra. The corner-sharing octahedral tilt angles range from 56-61°. In the second O site, O(2) is bonded to four equivalent Sr(1), one W(1), and one Cd(1) atom to form distorted OSr4CdW octahedra that share corners with four equivalent O(2)Sr4CdW octahedra, corners with four equivalent O(1)Sr3CdW square pyramids, edges with two equivalent O(2)Sr4CdW octahedra, faces with two equivalent O(2)Sr4CdW octahedra, and faces with four equivalent O(1)Sr3CdW square pyramids. The corner-sharing octahedral tilt angles are 53°. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one W(1), and one Cd(1) atom.
Sr2CdWO6 crystallizes in the orthorhombic Pmmn space group. Sr(1) is bonded in a 9-coordinate geometry to two equivalent O(3), three equivalent O(1), and four equivalent O(2) atoms. Both Sr(1)-O(3) bond lengths are 2.87 Å. There is one shorter (2.61 Å) and two longer (2.92 Å) Sr(1)-O(1) bond lengths. There are two shorter (2.81 Å) and two longer (2.89 Å) Sr(1)-O(2) bond lengths. W(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form WO6 octahedra that share corners with six equivalent Cd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-12°. Both W(1)-O(1) bond lengths are 1.95 Å. Both W(1)-O(2) bond lengths are 1.97 Å. Both W(1)-O(3) bond lengths are 1.92 Å. Cd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CdO6 octahedra that share corners with six equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-12°. Both Cd(1)-O(1) bond lengths are 2.25 Å. Both Cd(1)-O(2) bond lengths are 2.28 Å. Both Cd(1)-O(3) bond lengths are 2.24 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sr(1), one W(1), and one Cd(1) atom to form distorted OSr3CdW square pyramids that share corners with four equivalent O(2)Sr4CdW octahedra, corners with four equivalent O(1)Sr3CdW square pyramids, edges with two equivalent O(1)Sr3CdW square pyramids, and faces with four equivalent O(2)Sr4CdW octahedra. The corner-sharing octahedral tilt angles range from 56-61°. In the second O site, O(2) is bonded to four equivalent Sr(1), one W(1), and one Cd(1) atom to form distorted OSr4CdW octahedra that share corners with four equivalent O(2)Sr4CdW octahedra, corners with four equivalent O(1)Sr3CdW square pyramids, edges with two equivalent O(2)Sr4CdW octahedra, faces with two equivalent O(2)Sr4CdW octahedra, and faces with four equivalent O(1)Sr3CdW square pyramids. The corner-sharing octahedral tilt angles are 53°. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one W(1), and one Cd(1) atom.