LiSr(BS2)3 crystallizes in the monoclinic Cc space group. Li(1) is bonded to one S(1), one S(5), and two equivalent S(3) atoms to form corner-sharing LiS4 tetrahedra. Sr(1) is bonded in a 10-coordinate geometry to one B(3), one S(2), one S(3), one S(6), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one S(2), one S(5), and one S(6) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one S(2), one S(3), and one S(4) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one Sr(1), one S(1), one S(4), and one S(6) atom. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Li(1), two equivalent Sr(1), and one B(3) atom. In the second S site, S(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(2) atom. In the third S site, S(3) is bonded to two equivalent Li(1), one Sr(1), and one B(2) atom to form distorted SSrLi2B tetrahedra that share corners with two equivalent S(5)Sr2LiB tetrahedra, corners with two equivalent S(3)SrLi2B tetrahedra, and  an edgeedge with one S(5)Sr2LiB tetrahedra. In the fourth S site, S(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one B(2), and one B(3) atom. In the fifth S site, S(5) is bonded to one Li(1), two equivalent Sr(1), and one B(1) atom to form distorted SSr2LiB tetrahedra that share corners with two equivalent S(5)Sr2LiB tetrahedra, corners with two equivalent S(3)SrLi2B tetrahedra, and  an edgeedge with one S(3)SrLi2B tetrahedra. In the sixth S site, S(6) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom.
LiSr(BS2)3 crystallizes in the monoclinic Cc space group. Li(1) is bonded to one S(1), one S(5), and two equivalent S(3) atoms to form corner-sharing LiS4 tetrahedra. The Li(1)-S(1) bond length is 2.51 Å. The Li(1)-S(5) bond length is 2.55 Å. There is one shorter (2.52 Å) and one longer (2.62 Å) Li(1)-S(3) bond length. Sr(1) is bonded in a 10-coordinate geometry to one B(3), one S(2), one S(3), one S(6), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms. The Sr(1)-B(3) bond length is 3.36 Å. The Sr(1)-S(2) bond length is 3.41 Å. The Sr(1)-S(3) bond length is 3.09 Å. The Sr(1)-S(6) bond length is 3.56 Å. There is one shorter (3.12 Å) and one longer (3.17 Å) Sr(1)-S(1) bond length. There is one shorter (3.24 Å) and one longer (3.50 Å) Sr(1)-S(4) bond length. There is one shorter (3.05 Å) and one longer (3.07 Å) Sr(1)-S(5) bond length. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one S(2), one S(5), and one S(6) atom. The B(1)-S(2) bond length is 1.82 Å. The B(1)-S(5) bond length is 1.80 Å. The B(1)-S(6) bond length is 1.82 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one S(2), one S(3), and one S(4) atom. The B(2)-S(2) bond length is 1.82 Å. The B(2)-S(3) bond length is 1.78 Å. The B(2)-S(4) bond length is 1.83 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one Sr(1), one S(1), one S(4), and one S(6) atom. The B(3)-S(1) bond length is 1.79 Å. The B(3)-S(4) bond length is 1.83 Å. The B(3)-S(6) bond length is 1.82 Å. There are six inequivalent S sites. In the first S site, S(1) is bonded in a 4-coordinate geometry to one Li(1), two equivalent Sr(1), and one B(3) atom. In the second S site, S(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(2) atom. In the third S site, S(3) is bonded to two equivalent Li(1), one Sr(1), and one B(2) atom to form distorted SSrLi2B tetrahedra that share corners with two equivalent S(5)Sr2LiB tetrahedra, corners with two equivalent S(3)SrLi2B tetrahedra, and  an edgeedge with one S(5)Sr2LiB tetrahedra. In the fourth S site, S(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one B(2), and one B(3) atom. In the fifth S site, S(5) is bonded to one Li(1), two equivalent Sr(1), and one B(1) atom to form distorted SSr2LiB tetrahedra that share corners with two equivalent S(5)Sr2LiB tetrahedra, corners with two equivalent S(3)SrLi2B tetrahedra, and  an edgeedge with one S(3)SrLi2B tetrahedra. In the sixth S site, S(6) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom.