BaLaCuS3 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 7-coordinate geometry to two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. La(1) is bonded to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent La(1)S7 pentagonal bipyramids,  a cornercorner with one Cu(1)S4 tetrahedra, edges with four equivalent La(1)S7 pentagonal bipyramids, and edges with four equivalent Cu(1)S4 tetrahedra. Cu(1) is bonded to one S(1), one S(2), and two equivalent S(3) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one La(1)S7 pentagonal bipyramid, corners with two equivalent Cu(1)S4 tetrahedra, and edges with four equivalent La(1)S7 pentagonal bipyramids. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Ba(1), two equivalent La(1), and one Cu(1) atom to form distorted edge-sharing SBa3La2Cu octahedra. In the second S site, S(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), three equivalent La(1), and one Cu(1) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent La(1), and two equivalent Cu(1) atoms.
BaLaCuS3 crystallizes in the orthorhombic Pnma space group. Ba(1) is bonded in a 7-coordinate geometry to two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. Both Ba(1)-S(2) bond lengths are 3.26 Å. Both Ba(1)-S(3) bond lengths are 3.20 Å. There is one shorter (3.16 Å) and two longer (3.22 Å) Ba(1)-S(1) bond lengths. La(1) is bonded to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms to form distorted LaS7 pentagonal bipyramids that share corners with two equivalent La(1)S7 pentagonal bipyramids,  a cornercorner with one Cu(1)S4 tetrahedra, edges with four equivalent La(1)S7 pentagonal bipyramids, and edges with four equivalent Cu(1)S4 tetrahedra. Both La(1)-S(1) bond lengths are 2.95 Å. There is one shorter (3.00 Å) and one longer (3.01 Å) La(1)-S(3) bond length. There are two shorter (2.92 Å) and one longer (3.10 Å) La(1)-S(2) bond length. Cu(1) is bonded to one S(1), one S(2), and two equivalent S(3) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one La(1)S7 pentagonal bipyramid, corners with two equivalent Cu(1)S4 tetrahedra, and edges with four equivalent La(1)S7 pentagonal bipyramids. The Cu(1)-S(1) bond length is 2.33 Å. The Cu(1)-S(2) bond length is 2.38 Å. Both Cu(1)-S(3) bond lengths are 2.39 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Ba(1), two equivalent La(1), and one Cu(1) atom to form distorted edge-sharing SBa3La2Cu octahedra. In the second S site, S(2) is bonded in a 6-coordinate geometry to two equivalent Ba(1), three equivalent La(1), and one Cu(1) atom. In the third S site, S(3) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent La(1), and two equivalent Cu(1) atoms.