Gd2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), and four equivalent S(2) atoms. In the second Gd site, Gd(2) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing GdS7 pentagonal bipyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Gd(1) and three equivalent Gd(2) atoms to form a mixture of distorted edge, face, and corner-sharing SGd5 trigonal bipyramids. In the second S site, S(2) is bonded to one Gd(2) and four equivalent Gd(1) atoms to form a mixture of distorted edge, face, and corner-sharing SGd5 square pyramids. In the third S site, S(3) is bonded to two equivalent Gd(1) and three equivalent Gd(2) atoms to form a mixture of distorted edge and corner-sharing SGd5 trigonal bipyramids.
Gd2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), and four equivalent S(2) atoms. Both Gd(1)-S(1) bond lengths are 2.88 Å. There is one shorter (3.02 Å) and one longer (3.12 Å) Gd(1)-S(3) bond length. There are two shorter (2.76 Å) and two longer (2.92 Å) Gd(1)-S(2) bond lengths. In the second Gd site, Gd(2) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing GdS7 pentagonal bipyramids. The Gd(2)-S(2) bond length is 2.82 Å. There are two shorter (2.80 Å) and one longer (2.91 Å) Gd(2)-S(1) bond length. There are two shorter (2.76 Å) and one longer (2.92 Å) Gd(2)-S(3) bond length. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Gd(1) and three equivalent Gd(2) atoms to form a mixture of distorted edge, face, and corner-sharing SGd5 trigonal bipyramids. In the second S site, S(2) is bonded to one Gd(2) and four equivalent Gd(1) atoms to form a mixture of distorted edge, face, and corner-sharing SGd5 square pyramids. In the third S site, S(3) is bonded to two equivalent Gd(1) and three equivalent Gd(2) atoms to form a mixture of distorted edge and corner-sharing SGd5 trigonal bipyramids.