La2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(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 La site, La(2) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing LaS7 pentagonal bipyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form a mixture of distorted face, corner, and edge-sharing SLa5 trigonal bipyramids. In the second S site, S(2) is bonded to one La(2) and four equivalent La(1) atoms to form a mixture of distorted face, corner, and edge-sharing SLa5 square pyramids. In the third S site, S(3) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form a mixture of distorted corner and edge-sharing SLa5 trigonal bipyramids.
La2S3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(3), and four equivalent S(2) atoms. Both La(1)-S(1) bond lengths are 3.02 Å. There is one shorter (3.13 Å) and one longer (3.17 Å) La(1)-S(3) bond length. There are two shorter (2.88 Å) and two longer (3.06 Å) La(1)-S(2) bond lengths. In the second La site, La(2) is bonded to one S(2), three equivalent S(1), and three equivalent S(3) atoms to form distorted edge-sharing LaS7 pentagonal bipyramids. The La(2)-S(2) bond length is 2.93 Å. There are two shorter (2.92 Å) and one longer (3.02 Å) La(2)-S(1) bond length. There are two shorter (2.88 Å) and one longer (3.09 Å) La(2)-S(3) bond length. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form a mixture of distorted face, corner, and edge-sharing SLa5 trigonal bipyramids. In the second S site, S(2) is bonded to one La(2) and four equivalent La(1) atoms to form a mixture of distorted face, corner, and edge-sharing SLa5 square pyramids. In the third S site, S(3) is bonded to two equivalent La(1) and three equivalent La(2) atoms to form a mixture of distorted corner and edge-sharing SLa5 trigonal bipyramids.