CrAlO4 is Rutile-derived structured and crystallizes in the orthorhombic Cmmm space group. Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with eight equivalent Al(1)O6 octahedra and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with eight equivalent Cr(1)O6 octahedra and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cr(1) and one Al(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Cr(1) and two equivalent Al(1) atoms.
CrAlO4 is Rutile-derived structured and crystallizes in the orthorhombic Cmmm space group. Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with eight equivalent Al(1)O6 octahedra and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. Both Cr(1)-O(2) bond lengths are 1.89 Å. All Cr(1)-O(1) bond lengths are 1.92 Å. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with eight equivalent Cr(1)O6 octahedra and edges with two equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-50°. Both Al(1)-O(1) bond lengths are 1.93 Å. All Al(1)-O(2) bond lengths are 1.90 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cr(1) and one Al(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Cr(1) and two equivalent Al(1) atoms.