Cr2AlO4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Al(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Al(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Al(1) atom.
Cr2AlO4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cr(1)-O(1) bond lengths are 1.97 Å. Both Cr(1)-O(2) bond lengths are 1.99 Å. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cr(2)-O(1) bond lengths are 2.00 Å. Both Cr(2)-O(2) bond lengths are 1.96 Å. Al(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Al(1)-O(1) bond lengths are 1.88 Å. Both Al(1)-O(2) bond lengths are 1.88 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Al(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Cr(1), one Cr(2), and one Al(1) atom.