Sr3Cr2S2O5 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with eight equivalent Cr(1)SO5 octahedra. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to five equivalent S(1), two equivalent O(1), and two equivalent O(2) atoms. Cr(1) is bonded to one S(1), one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted CrSO5 octahedra that share corners with five equivalent Cr(1)SO5 octahedra and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. S(1) is bonded in a 6-coordinate geometry to five equivalent Sr(2) and one Cr(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form a mixture of distorted corner, face, and edge-sharing OSr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form a mixture of distorted corner, face, and edge-sharing OSr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Sr(1) and two equivalent Cr(1) atoms.
Sr3Cr2S2O5 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with four equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with eight equivalent Cr(1)SO5 octahedra. All Sr(1)-O(1) bond lengths are 2.82 Å. All Sr(1)-O(2) bond lengths are 2.74 Å. All Sr(1)-O(3) bond lengths are 2.84 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to five equivalent S(1), two equivalent O(1), and two equivalent O(2) atoms. There are four shorter (2.92 Å) and one longer (3.24 Å) Sr(2)-S(1) bond length. Both Sr(2)-O(1) bond lengths are 2.70 Å. Both Sr(2)-O(2) bond lengths are 2.63 Å. Cr(1) is bonded to one S(1), one O(3), two equivalent O(1), and two equivalent O(2) atoms to form distorted CrSO5 octahedra that share corners with five equivalent Cr(1)SO5 octahedra and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. The Cr(1)-S(1) bond length is 2.47 Å. The Cr(1)-O(3) bond length is 1.91 Å. Both Cr(1)-O(1) bond lengths are 1.96 Å. Both Cr(1)-O(2) bond lengths are 2.05 Å. S(1) is bonded in a 6-coordinate geometry to five equivalent Sr(2) and one Cr(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form a mixture of distorted corner, face, and edge-sharing OSr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Cr(1) atoms to form a mixture of distorted corner, face, and edge-sharing OSr4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the third O site, O(3) is bonded in a distorted linear geometry to four equivalent Sr(1) and two equivalent Cr(1) atoms.