La2S2O crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 3-coordinate geometry to two equivalent S(2), three equivalent S(1), and three equivalent O(1) atoms. In the second La site, La(2) is bonded to two equivalent S(1), three equivalent S(2), and one O(1) atom to form a mixture of distorted corner and edge-sharing LaS5O octahedra. The corner-sharing octahedral tilt angles are 68°. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent La(2) and three equivalent La(1) atoms to form distorted SLa5 square pyramids that share corners with five equivalent O(1)La4 tetrahedra, edges with four equivalent S(1)La5 square pyramids, and edges with three equivalent O(1)La4 tetrahedra. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent La(1) and three equivalent La(2) atoms. O(1) is bonded to one La(2) and three equivalent La(1) atoms to form OLa4 tetrahedra that share corners with five equivalent S(1)La5 square pyramids, corners with two equivalent O(1)La4 tetrahedra, edges with three equivalent S(1)La5 square pyramids, and edges with two equivalent O(1)La4 tetrahedra.
La2S2O crystallizes in the orthorhombic Pnma space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 3-coordinate geometry to two equivalent S(2), three equivalent S(1), and three equivalent O(1) atoms. Both La(1)-S(2) bond lengths are 3.20 Å. There is one shorter (3.05 Å) and two longer (3.18 Å) La(1)-S(1) bond lengths. There are two shorter (2.40 Å) and one longer (2.44 Å) La(1)-O(1) bond length. In the second La site, La(2) is bonded to two equivalent S(1), three equivalent S(2), and one O(1) atom to form a mixture of distorted corner and edge-sharing LaS5O octahedra. The corner-sharing octahedral tilt angles are 68°. Both La(2)-S(1) bond lengths are 2.89 Å. There are two shorter (2.87 Å) and one longer (2.90 Å) La(2)-S(2) bond length. The La(2)-O(1) bond length is 2.36 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent La(2) and three equivalent La(1) atoms to form distorted SLa5 square pyramids that share corners with five equivalent O(1)La4 tetrahedra, edges with four equivalent S(1)La5 square pyramids, and edges with three equivalent O(1)La4 tetrahedra. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent La(1) and three equivalent La(2) atoms. O(1) is bonded to one La(2) and three equivalent La(1) atoms to form OLa4 tetrahedra that share corners with five equivalent S(1)La5 square pyramids, corners with two equivalent O(1)La4 tetrahedra, edges with three equivalent S(1)La5 square pyramids, and edges with two equivalent O(1)La4 tetrahedra.