La7YAl8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with eight equivalent La(1)O12 cuboctahedra, faces with two equivalent Y(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the second La site, La(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with four equivalent Y(1)O12 cuboctahedra, corners with eight equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with four equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. In the third La site, La(3) is bonded to twelve equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with twelve equivalent La(1)O12 cuboctahedra, faces with six equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Y(1) is bonded to twelve equivalent O(1) atoms to form YO12 cuboctahedra that share corners with twelve equivalent La(2)O12 cuboctahedra, faces with six equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Al(1)O6 octahedra,  a faceface with one La(3)O12 cuboctahedra,  a faceface with one Y(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with three equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one La(2), two equivalent La(1), one Y(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one La(1), one La(3), two equivalent La(2), and two equivalent Al(1) atoms.
La7YAl8O24 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Pm-3m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with eight equivalent La(1)O12 cuboctahedra, faces with two equivalent Y(1)O12 cuboctahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. All La(1)-O(2) bond lengths are 2.68 Å. All La(1)-O(1) bond lengths are 2.69 Å. In the second La site, La(2) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with four equivalent Y(1)O12 cuboctahedra, corners with eight equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with four equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. All La(2)-O(1) bond lengths are 2.71 Å. All La(2)-O(2) bond lengths are 2.69 Å. In the third La site, La(3) is bonded to twelve equivalent O(2) atoms to form LaO12 cuboctahedra that share corners with twelve equivalent La(1)O12 cuboctahedra, faces with six equivalent La(2)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. All La(3)-O(2) bond lengths are 2.69 Å. Y(1) is bonded to twelve equivalent O(1) atoms to form YO12 cuboctahedra that share corners with twelve equivalent La(2)O12 cuboctahedra, faces with six equivalent La(1)O12 cuboctahedra, and faces with eight equivalent Al(1)O6 octahedra. All Y(1)-O(1) bond lengths are 2.66 Å. Al(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent Al(1)O6 octahedra,  a faceface with one La(3)O12 cuboctahedra,  a faceface with one Y(1)O12 cuboctahedra, faces with three equivalent La(1)O12 cuboctahedra, and faces with three equivalent La(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. All Al(1)-O(1) bond lengths are 1.89 Å. All Al(1)-O(2) bond lengths are 1.91 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one La(2), two equivalent La(1), one Y(1), and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a distorted linear geometry to one La(1), one La(3), two equivalent La(2), and two equivalent Al(1) atoms.