Sr2La3Fe4CuO15 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to three equivalent O(1), three equivalent O(2), and six equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with three equivalent La(2)O12 cuboctahedra, corners with nine equivalent Sr(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, faces with three equivalent La(2)O12 cuboctahedra,  a faceface with one Cu(1)O6 octahedra, faces with three equivalent Fe(1)O6 octahedra, and faces with four equivalent Fe(2)O6 octahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to six equivalent O(1) and six equivalent O(3) atoms to form LaO12 cuboctahedra that share corners with six equivalent La(1)O12 cuboctahedra, corners with six equivalent La(2)O12 cuboctahedra, faces with six equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, and faces with six equivalent Fe(2)O6 octahedra. In the second La site, La(2) is bonded to three equivalent O(3) and nine equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent La(1)O12 cuboctahedra, corners with six equivalent La(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent La(2)O12 cuboctahedra,  a faceface with one Fe(2)O6 octahedra, faces with three equivalent Cu(1)O6 octahedra, and faces with four equivalent Fe(1)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Cu(1)O6 octahedra,  a faceface with one La(1)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra,  a faceface with one La(2)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. Cu(1) is bonded to six equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. There are three inequivalent O sites. In the first O site, O(2) is bonded to one Sr(1), three equivalent La(2), one Fe(1), and one Cu(1) atom to form a mixture of distorted face, corner, and edge-sharing OSrLa3FeCu octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the second O site, O(3) is bonded in a distorted linear geometry to two equivalent Sr(1), one La(1), one La(2), one Fe(1), and one Fe(2) atom. In the third O site, O(1) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent La(1), and two equivalent Fe(2) atoms.
Sr2La3Fe4CuO15 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to three equivalent O(1), three equivalent O(2), and six equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with three equivalent La(2)O12 cuboctahedra, corners with nine equivalent Sr(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, faces with three equivalent La(2)O12 cuboctahedra,  a faceface with one Cu(1)O6 octahedra, faces with three equivalent Fe(1)O6 octahedra, and faces with four equivalent Fe(2)O6 octahedra. All Sr(1)-O(1) bond lengths are 2.79 Å. All Sr(1)-O(2) bond lengths are 2.81 Å. All Sr(1)-O(3) bond lengths are 2.77 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded to six equivalent O(1) and six equivalent O(3) atoms to form LaO12 cuboctahedra that share corners with six equivalent La(1)O12 cuboctahedra, corners with six equivalent La(2)O12 cuboctahedra, faces with six equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, and faces with six equivalent Fe(2)O6 octahedra. All La(1)-O(1) bond lengths are 2.77 Å. All La(1)-O(3) bond lengths are 2.75 Å. In the second La site, La(2) is bonded to three equivalent O(3) and nine equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with three equivalent Sr(1)O12 cuboctahedra, corners with three equivalent La(1)O12 cuboctahedra, corners with six equivalent La(2)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, faces with three equivalent La(2)O12 cuboctahedra,  a faceface with one Fe(2)O6 octahedra, faces with three equivalent Cu(1)O6 octahedra, and faces with four equivalent Fe(1)O6 octahedra. All La(2)-O(3) bond lengths are 2.83 Å. There are three shorter (2.65 Å) and six longer (2.77 Å) La(2)-O(2) bond lengths. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Cu(1)O6 octahedra,  a faceface with one La(1)O12 cuboctahedra, faces with three equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 1-4°. All Fe(1)-O(2) bond lengths are 1.94 Å. All Fe(1)-O(3) bond lengths are 1.97 Å. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form FeO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra,  a faceface with one La(2)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. All Fe(2)-O(1) bond lengths are 1.96 Å. All Fe(2)-O(3) bond lengths are 1.94 Å. Cu(1) is bonded to six equivalent O(2) atoms to form CuO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, faces with two equivalent Sr(1)O12 cuboctahedra, and faces with six equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 4°. All Cu(1)-O(2) bond lengths are 1.97 Å. There are three inequivalent O sites. In the first O site, O(2) is bonded to one Sr(1), three equivalent La(2), one Fe(1), and one Cu(1) atom to form a mixture of distorted face, corner, and edge-sharing OSrLa3FeCu octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the second O site, O(3) is bonded in a distorted linear geometry to two equivalent Sr(1), one La(1), one La(2), one Fe(1), and one Fe(2) atom. In the third O site, O(1) is bonded in a distorted linear geometry to two equivalent Sr(1), two equivalent La(1), and two equivalent Fe(2) atoms.