ErPmO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to six equivalent O(1) atoms to form ErO6 octahedra that share corners with six equivalent Er(1)O6 octahedra and faces with eight equivalent Pm(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. Pm(1) is bonded to twelve equivalent O(1) atoms to form PmO12 cuboctahedra that share corners with twelve equivalent Pm(1)O12 cuboctahedra, faces with six equivalent Pm(1)O12 cuboctahedra, and faces with eight equivalent Er(1)O6 octahedra. O(1) is bonded in a distorted linear geometry to two equivalent Er(1) and four equivalent Pm(1) atoms.
ErPmO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to six equivalent O(1) atoms to form ErO6 octahedra that share corners with six equivalent Er(1)O6 octahedra and faces with eight equivalent Pm(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. All Er(1)-O(1) bond lengths are 2.13 Å. Pm(1) is bonded to twelve equivalent O(1) atoms to form PmO12 cuboctahedra that share corners with twelve equivalent Pm(1)O12 cuboctahedra, faces with six equivalent Pm(1)O12 cuboctahedra, and faces with eight equivalent Er(1)O6 octahedra. All Pm(1)-O(1) bond lengths are 3.02 Å. O(1) is bonded in a distorted linear geometry to two equivalent Er(1) and four equivalent Pm(1) atoms.