RhAlO3 crystallizes in the hexagonal P6_3/mmc space group. Rh(1) is bonded to six equivalent O(1) atoms to form RhO6 octahedra that share corners with six equivalent Al(1)O5 trigonal bipyramids and edges with six equivalent Rh(1)O6 octahedra. Al(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form AlO5 trigonal bipyramids that share corners with six equivalent Rh(1)O6 octahedra and corners with six equivalent Al(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 61°. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Rh(1) and one Al(1) atom to form a mixture of distorted corner and edge-sharing OAlRh3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Al(1) atoms.
RhAlO3 crystallizes in the hexagonal P6_3/mmc space group. Rh(1) is bonded to six equivalent O(1) atoms to form RhO6 octahedra that share corners with six equivalent Al(1)O5 trigonal bipyramids and edges with six equivalent Rh(1)O6 octahedra. All Rh(1)-O(1) bond lengths are 2.07 Å. Al(1) is bonded to two equivalent O(1) and three equivalent O(2) atoms to form AlO5 trigonal bipyramids that share corners with six equivalent Rh(1)O6 octahedra and corners with six equivalent Al(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 61°. Both Al(1)-O(1) bond lengths are 1.92 Å. All Al(1)-O(2) bond lengths are 1.80 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Rh(1) and one Al(1) atom to form a mixture of distorted corner and edge-sharing OAlRh3 tetrahedra. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Al(1) atoms.