La4MnCu6S10 crystallizes in the triclinic P-1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(5), two equivalent S(3), and two equivalent S(4) atoms. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(2), one S(4), one S(5), two equivalent S(1), and two equivalent S(3) atoms. Mn(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms to form MnS6 octahedra that share corners with two equivalent Cu(2)S4 tetrahedra, corners with two equivalent Cu(3)S4 tetrahedra, corners with four equivalent Cu(1)S4 tetrahedra, edges with two equivalent Cu(2)S4 tetrahedra, and edges with two equivalent Cu(3)S4 tetrahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(3), one S(4), and two equivalent S(2) atoms to form distorted CuS4 tetrahedra that share corners with two equivalent Mn(1)S6 octahedra,  a cornercorner with one Cu(3)S4 tetrahedra, corners with three equivalent Cu(2)S4 tetrahedra, and  an edgeedge with one Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 1-66°. In the second Cu site, Cu(2) is bonded to one S(1), one S(2), one S(4), and one S(5) atom to form distorted CuS4 tetrahedra that share  a cornercorner with one Mn(1)S6 octahedra, corners with two equivalent Cu(3)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra,  an edgeedge with one Mn(1)S6 octahedra, and  an edgeedge with one Cu(3)S4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. In the third Cu site, Cu(3) is bonded to one S(1), one S(4), and two equivalent S(5) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one Mn(1)S6 octahedra,  a cornercorner with one Cu(1)S4 tetrahedra, corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one Mn(1)S6 octahedra,  an edgeedge with one Cu(2)S4 tetrahedra, and  an edgeedge with one Cu(3)S4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are five inequivalent S sites. In the first S site, S(1) is bonded to one La(1), two equivalent La(2), one Mn(1), one Cu(2), and one Cu(3) atom to form distorted SLa3MnCu2 octahedra that share  a cornercorner with one S(1)La3MnCu2 octahedra, corners with four equivalent S(3)La4Cu trigonal bipyramids,  an edgeedge with one S(1)La3MnCu2 octahedra, edges with three equivalent S(2)La2MnCu3 octahedra, and  an edgeedge with one S(3)La4Cu trigonal bipyramid. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded to one La(1), one La(2), one Mn(1), one Cu(2), and two equivalent Cu(1) atoms to form distorted SLa2MnCu3 octahedra that share  a cornercorner with one S(2)La2MnCu3 octahedra, corners with four equivalent S(3)La4Cu trigonal bipyramids,  an edgeedge with one S(2)La2MnCu3 octahedra, edges with three equivalent S(1)La3MnCu2 octahedra, and  an edgeedge with one S(3)La4Cu trigonal bipyramid. The corner-sharing octahedra are not tilted. In the third S site, S(3) is bonded to two equivalent La(1), two equivalent La(2), and one Cu(1) atom to form distorted SLa4Cu trigonal bipyramids that share corners with four equivalent S(2)La2MnCu3 octahedra, corners with four equivalent S(1)La3MnCu2 octahedra,  an edgeedge with one S(2)La2MnCu3 octahedra,  an edgeedge with one S(1)La3MnCu2 octahedra, and edges with two equivalent S(3)La4Cu trigonal bipyramids. The corner-sharing octahedral tilt angles range from 26-92°. In the fourth S site, S(4) is bonded in a 6-coordinate geometry to one La(2), two equivalent La(1), one Cu(1), one Cu(2), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 6-coordinate geometry to one La(1), one La(2), one Mn(1), one Cu(2), and two equivalent Cu(3) atoms.
La4MnCu6S10 crystallizes in the triclinic P-1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one S(1), one S(2), one S(5), two equivalent S(3), and two equivalent S(4) atoms. The La(1)-S(1) bond length is 2.98 Å. The La(1)-S(2) bond length is 2.92 Å. The La(1)-S(5) bond length is 3.03 Å. There is one shorter (2.88 Å) and one longer (2.95 Å) La(1)-S(3) bond length. There is one shorter (2.94 Å) and one longer (3.11 Å) La(1)-S(4) bond length. In the second La site, La(2) is bonded in a 7-coordinate geometry to one S(2), one S(4), one S(5), two equivalent S(1), and two equivalent S(3) atoms. The La(2)-S(2) bond length is 2.94 Å. The La(2)-S(4) bond length is 2.92 Å. The La(2)-S(5) bond length is 2.91 Å. There is one shorter (2.88 Å) and one longer (3.07 Å) La(2)-S(1) bond length. There is one shorter (2.90 Å) and one longer (2.97 Å) La(2)-S(3) bond length. Mn(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms to form MnS6 octahedra that share corners with two equivalent Cu(2)S4 tetrahedra, corners with two equivalent Cu(3)S4 tetrahedra, corners with four equivalent Cu(1)S4 tetrahedra, edges with two equivalent Cu(2)S4 tetrahedra, and edges with two equivalent Cu(3)S4 tetrahedra. Both Mn(1)-S(1) bond lengths are 2.76 Å. Both Mn(1)-S(2) bond lengths are 2.56 Å. Both Mn(1)-S(5) bond lengths are 2.62 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(3), one S(4), and two equivalent S(2) atoms to form distorted CuS4 tetrahedra that share corners with two equivalent Mn(1)S6 octahedra,  a cornercorner with one Cu(3)S4 tetrahedra, corners with three equivalent Cu(2)S4 tetrahedra, and  an edgeedge with one Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 1-66°. The Cu(1)-S(3) bond length is 2.32 Å. The Cu(1)-S(4) bond length is 2.33 Å. There is one shorter (2.40 Å) and one longer (2.43 Å) Cu(1)-S(2) bond length. In the second Cu site, Cu(2) is bonded to one S(1), one S(2), one S(4), and one S(5) atom to form distorted CuS4 tetrahedra that share  a cornercorner with one Mn(1)S6 octahedra, corners with two equivalent Cu(3)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra,  an edgeedge with one Mn(1)S6 octahedra, and  an edgeedge with one Cu(3)S4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. The Cu(2)-S(1) bond length is 2.31 Å. The Cu(2)-S(2) bond length is 2.38 Å. The Cu(2)-S(4) bond length is 2.49 Å. The Cu(2)-S(5) bond length is 2.35 Å. In the third Cu site, Cu(3) is bonded to one S(1), one S(4), and two equivalent S(5) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one Mn(1)S6 octahedra,  a cornercorner with one Cu(1)S4 tetrahedra, corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one Mn(1)S6 octahedra,  an edgeedge with one Cu(2)S4 tetrahedra, and  an edgeedge with one Cu(3)S4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. The Cu(3)-S(1) bond length is 2.26 Å. The Cu(3)-S(4) bond length is 2.30 Å. There is one shorter (2.36 Å) and one longer (2.39 Å) Cu(3)-S(5) bond length. There are five inequivalent S sites. In the first S site, S(1) is bonded to one La(1), two equivalent La(2), one Mn(1), one Cu(2), and one Cu(3) atom to form distorted SLa3MnCu2 octahedra that share  a cornercorner with one S(1)La3MnCu2 octahedra, corners with four equivalent S(3)La4Cu trigonal bipyramids,  an edgeedge with one S(1)La3MnCu2 octahedra, edges with three equivalent S(2)La2MnCu3 octahedra, and  an edgeedge with one S(3)La4Cu trigonal bipyramid. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded to one La(1), one La(2), one Mn(1), one Cu(2), and two equivalent Cu(1) atoms to form distorted SLa2MnCu3 octahedra that share  a cornercorner with one S(2)La2MnCu3 octahedra, corners with four equivalent S(3)La4Cu trigonal bipyramids,  an edgeedge with one S(2)La2MnCu3 octahedra, edges with three equivalent S(1)La3MnCu2 octahedra, and  an edgeedge with one S(3)La4Cu trigonal bipyramid. The corner-sharing octahedra are not tilted. In the third S site, S(3) is bonded to two equivalent La(1), two equivalent La(2), and one Cu(1) atom to form distorted SLa4Cu trigonal bipyramids that share corners with four equivalent S(2)La2MnCu3 octahedra, corners with four equivalent S(1)La3MnCu2 octahedra,  an edgeedge with one S(2)La2MnCu3 octahedra,  an edgeedge with one S(1)La3MnCu2 octahedra, and edges with two equivalent S(3)La4Cu trigonal bipyramids. The corner-sharing octahedral tilt angles range from 26-92°. In the fourth S site, S(4) is bonded in a 6-coordinate geometry to one La(2), two equivalent La(1), one Cu(1), one Cu(2), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 6-coordinate geometry to one La(1), one La(2), one Mn(1), one Cu(2), and two equivalent Cu(3) atoms.