Tb2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing TbS7 pentagonal bipyramids. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), and four equivalent S(2) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Tb(2) and three equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing STb5 trigonal bipyramids. In the second S site, S(2) is bonded to one Tb(1) and four equivalent Tb(2) atoms to form a mixture of distorted edge, corner, and face-sharing STb5 square pyramids. In the third S site, S(3) is bonded to two equivalent Tb(2) and three equivalent Tb(1) atoms to form a mixture of distorted edge, corner, and face-sharing STb5 trigonal bipyramids.
Tb2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing TbS7 pentagonal bipyramids. The Tb(1)-S(2) bond length is 2.80 Å. There are two shorter (2.73 Å) and one longer (2.91 Å) Tb(1)-S(1) bond length. There are two shorter (2.78 Å) and one longer (2.88 Å) Tb(1)-S(3) bond length. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), and four equivalent S(2) atoms. There is one shorter (3.02 Å) and one longer (3.07 Å) Tb(2)-S(1) bond length. Both Tb(2)-S(3) bond lengths are 2.86 Å. There are two shorter (2.74 Å) and two longer (2.90 Å) Tb(2)-S(2) bond lengths. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Tb(2) and three equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing STb5 trigonal bipyramids. In the second S site, S(2) is bonded to one Tb(1) and four equivalent Tb(2) atoms to form a mixture of distorted edge, corner, and face-sharing STb5 square pyramids. In the third S site, S(3) is bonded to two equivalent Tb(2) and three equivalent Tb(1) atoms to form a mixture of distorted edge, corner, and face-sharing STb5 trigonal bipyramids.