La7Mn8O24 is Orthorhombic Perovskite-like structured and crystallizes in the tetragonal I-4m2 space group. There are five inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(1) and four equivalent O(2) atoms to form distorted LaO8 cuboctahedra that share corners with four equivalent La(4)O12 cuboctahedra and edges with eight equivalent Mn(1)O6 octahedra. In the second La site, La(2) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(1) atoms. In the third La site, La(3) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(4)O12 cuboctahedra and faces with eight equivalent Mn(1)O6 octahedra. In the fourth La site, La(4) is bonded to four equivalent O(2), four equivalent O(3), and four equivalent O(6) atoms to form distorted LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with four equivalent La(1)O8 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. In the fifth La site, La(5) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(3) atoms. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra,  an edgeedge with one La(1)O8 cuboctahedra,  a faceface with one La(3)O12 cuboctahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-25°. There are six inequivalent O sites. In the first O site, O(3) is bonded to one La(3), one La(4), two equivalent La(5), and two equivalent Mn(1) atoms to form distorted OLa4Mn2 octahedra that share corners with four equivalent O(3)La4Mn2 octahedra, corners with two equivalent O(1)La3Mn2 square pyramids, and edges with four equivalent O(3)La4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second O site, O(4) is bonded in a 3-coordinate geometry to one La(2), one La(3), one La(5), and two equivalent Mn(1) atoms. In the third O site, O(5) is bonded in a 4-coordinate geometry to one La(2), one La(3), one La(5), and two equivalent Mn(1) atoms. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to one La(2), one La(4), one La(5), and two equivalent Mn(1) atoms. In the fifth O site, O(1) is bonded to one La(1), two equivalent La(2), and two equivalent Mn(1) atoms to form distorted OLa3Mn2 square pyramids that share corners with two equivalent O(3)La4Mn2 octahedra, corners with five equivalent O(1)La3Mn2 square pyramids, and edges with two equivalent O(1)La3Mn2 square pyramids. The corner-sharing octahedral tilt angles are 7°. In the sixth O site, O(2) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(4), one La(5), and two equivalent Mn(1) atoms.
La7Mn8O24 is Orthorhombic Perovskite-like structured and crystallizes in the tetragonal I-4m2 space group. There are five inequivalent La sites. In the first La site, La(1) is bonded to four equivalent O(1) and four equivalent O(2) atoms to form distorted LaO8 cuboctahedra that share corners with four equivalent La(4)O12 cuboctahedra and edges with eight equivalent Mn(1)O6 octahedra. All La(1)-O(1) bond lengths are 2.59 Å. All La(1)-O(2) bond lengths are 2.57 Å. In the second La site, La(2) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(1) atoms. Both La(2)-O(2) bond lengths are 3.05 Å. Both La(2)-O(4) bond lengths are 3.05 Å. Both La(2)-O(5) bond lengths are 2.54 Å. Both La(2)-O(6) bond lengths are 2.52 Å. All La(2)-O(1) bond lengths are 2.75 Å. In the third La site, La(3) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms to form LaO12 cuboctahedra that share corners with four equivalent La(4)O12 cuboctahedra and faces with eight equivalent Mn(1)O6 octahedra. All La(3)-O(3) bond lengths are 2.78 Å. All La(3)-O(4) bond lengths are 2.85 Å. All La(3)-O(5) bond lengths are 2.55 Å. In the fourth La site, La(4) is bonded to four equivalent O(2), four equivalent O(3), and four equivalent O(6) atoms to form distorted LaO12 cuboctahedra that share corners with four equivalent La(3)O12 cuboctahedra, corners with four equivalent La(1)O8 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. All La(4)-O(2) bond lengths are 3.00 Å. All La(4)-O(3) bond lengths are 2.71 Å. All La(4)-O(6) bond lengths are 2.49 Å. In the fifth La site, La(5) is bonded in a 12-coordinate geometry to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(3) atoms. Both La(5)-O(2) bond lengths are 2.53 Å. Both La(5)-O(4) bond lengths are 2.48 Å. Both La(5)-O(5) bond lengths are 3.06 Å. Both La(5)-O(6) bond lengths are 3.03 Å. All La(5)-O(3) bond lengths are 2.75 Å. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra,  an edgeedge with one La(1)O8 cuboctahedra,  a faceface with one La(3)O12 cuboctahedra, and  a faceface with one La(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 2-25°. The Mn(1)-O(1) bond length is 1.95 Å. The Mn(1)-O(2) bond length is 2.00 Å. The Mn(1)-O(3) bond length is 2.01 Å. The Mn(1)-O(4) bond length is 1.94 Å. The Mn(1)-O(5) bond length is 1.99 Å. The Mn(1)-O(6) bond length is 1.97 Å. There are six inequivalent O sites. In the first O site, O(3) is bonded to one La(3), one La(4), two equivalent La(5), and two equivalent Mn(1) atoms to form distorted OLa4Mn2 octahedra that share corners with four equivalent O(3)La4Mn2 octahedra, corners with two equivalent O(1)La3Mn2 square pyramids, and edges with four equivalent O(3)La4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second O site, O(4) is bonded in a 3-coordinate geometry to one La(2), one La(3), one La(5), and two equivalent Mn(1) atoms. In the third O site, O(5) is bonded in a 4-coordinate geometry to one La(2), one La(3), one La(5), and two equivalent Mn(1) atoms. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to one La(2), one La(4), one La(5), and two equivalent Mn(1) atoms. In the fifth O site, O(1) is bonded to one La(1), two equivalent La(2), and two equivalent Mn(1) atoms to form distorted OLa3Mn2 square pyramids that share corners with two equivalent O(3)La4Mn2 octahedra, corners with five equivalent O(1)La3Mn2 square pyramids, and edges with two equivalent O(1)La3Mn2 square pyramids. The corner-sharing octahedral tilt angles are 7°. In the sixth O site, O(2) is bonded in a 4-coordinate geometry to one La(1), one La(2), one La(4), one La(5), and two equivalent Mn(1) atoms.