KAlCH2O5 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Al(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form edge-sharing AlO6 octahedra. C(1) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(2) atoms. H(1) is bonded in a single-bond geometry to one O(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one K(1), two equivalent Al(1), and one H(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to two equivalent K(1) and one C(1) atom.
KAlCH2O5 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both K(1)-O(1) bond lengths are 2.82 Å. Both K(1)-O(2) bond lengths are 2.84 Å. Both K(1)-O(3) bond lengths are 2.88 Å. Al(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form edge-sharing AlO6 octahedra. Both Al(1)-O(2) bond lengths are 1.92 Å. All Al(1)-O(1) bond lengths are 1.92 Å. C(1) is bonded in a trigonal planar geometry to one O(3) and two equivalent O(2) atoms. The C(1)-O(3) bond length is 1.28 Å. Both C(1)-O(2) bond lengths are 1.31 Å. H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one K(1), two equivalent Al(1), and one H(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Al(1), and one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to two equivalent K(1) and one C(1) atom.