Sr3Mn2Cu2S2O5 crystallizes in the tetragonal I4mm space group. There are three 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, faces with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Mn(2)O5 square pyramids. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent S(1) and four equivalent O(2) atoms. In the third Sr site, Sr(3) is bonded in a 4-coordinate geometry to four equivalent S(2) and four equivalent O(3) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1) and four equivalent O(3) atoms to form MnO5 square pyramids that share  a cornercorner with one Mn(2)O5 square pyramid, corners with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Sr(1)O12 cuboctahedra. In the second Mn site, Mn(2) is bonded to one O(1) and four equivalent O(2) atoms to form MnO5 square pyramids that share  a cornercorner with one Mn(1)O5 square pyramid, corners with four equivalent Mn(2)O5 square pyramids, and faces with four equivalent Sr(1)O12 cuboctahedra. Cu(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form a mixture of edge and corner-sharing CuS4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 8-coordinate geometry to four equivalent Sr(2) and four equivalent Cu(1) atoms. In the second S site, S(2) is bonded in a 8-coordinate geometry to four equivalent Sr(3) and four equivalent Cu(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Mn(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Mn(1) atoms.
Sr3Mn2Cu2S2O5 crystallizes in the tetragonal I4mm space group. There are three 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, faces with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Mn(2)O5 square pyramids. All Sr(1)-O(1) bond lengths are 2.77 Å. All Sr(1)-O(2) bond lengths are 3.02 Å. All Sr(1)-O(3) bond lengths are 3.03 Å. In the second Sr site, Sr(2) is bonded in a 4-coordinate geometry to four equivalent S(1) and four equivalent O(2) atoms. All Sr(2)-S(1) bond lengths are 3.21 Å. All Sr(2)-O(2) bond lengths are 2.50 Å. In the third Sr site, Sr(3) is bonded in a 4-coordinate geometry to four equivalent S(2) and four equivalent O(3) atoms. All Sr(3)-S(2) bond lengths are 3.21 Å. All Sr(3)-O(3) bond lengths are 2.50 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1) and four equivalent O(3) atoms to form MnO5 square pyramids that share  a cornercorner with one Mn(2)O5 square pyramid, corners with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Sr(1)O12 cuboctahedra. The Mn(1)-O(1) bond length is 2.02 Å. All Mn(1)-O(3) bond lengths are 1.98 Å. In the second Mn site, Mn(2) is bonded to one O(1) and four equivalent O(2) atoms to form MnO5 square pyramids that share  a cornercorner with one Mn(1)O5 square pyramid, corners with four equivalent Mn(2)O5 square pyramids, and faces with four equivalent Sr(1)O12 cuboctahedra. The Mn(2)-O(1) bond length is 2.02 Å. All Mn(2)-O(2) bond lengths are 1.98 Å. Cu(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form a mixture of edge and corner-sharing CuS4 tetrahedra. Both Cu(1)-S(1) bond lengths are 2.41 Å. Both Cu(1)-S(2) bond lengths are 2.41 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 8-coordinate geometry to four equivalent Sr(2) and four equivalent Cu(1) atoms. In the second S site, S(2) is bonded in a 8-coordinate geometry to four equivalent Sr(3) and four equivalent Cu(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Mn(2) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Mn(1) atoms.