NdMn7O12 crystallizes in the cubic Im-3 space group. Nd(1) is bonded to twelve equivalent O(1) atoms to form NdO12 cuboctahedra that share faces with eight equivalent Mn(2)O6 octahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Mn site, Mn(2) is bonded to six equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra and faces with two equivalent Nd(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 41°. O(1) is bonded in a 3-coordinate geometry to one Nd(1), one Mn(1), and two equivalent Mn(2) atoms.
NdMn7O12 crystallizes in the cubic Im-3 space group. Nd(1) is bonded to twelve equivalent O(1) atoms to form NdO12 cuboctahedra that share faces with eight equivalent Mn(2)O6 octahedra. All Nd(1)-O(1) bond lengths are 2.67 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Mn(1)-O(1) bond lengths are 1.98 Å. In the second Mn site, Mn(2) is bonded to six equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(2)O6 octahedra and faces with two equivalent Nd(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 41°. All Mn(2)-O(1) bond lengths are 2.02 Å. O(1) is bonded in a 3-coordinate geometry to one Nd(1), one Mn(1), and two equivalent Mn(2) atoms.