ErAlO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 30°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Er(1) and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Er(1) and two equivalent Al(1) atoms.
ErAlO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Er(1) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. There is one shorter (2.21 Å) and one longer (2.28 Å) Er(1)-O(1) bond length. There are a spread of Er(1)-O(2) bond distances ranging from 2.25-2.57 Å. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 30°. Both Al(1)-O(1) bond lengths are 1.90 Å. There are two shorter (1.90 Å) and two longer (1.92 Å) Al(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Er(1) and two equivalent Al(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Er(1) and two equivalent Al(1) atoms.