Rb2AlOF5 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent F(3), four equivalent F(1), and four equivalent F(2) atoms. Al(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles are 5°. O(1) is bonded in a distorted square co-planar geometry to four equivalent Rb(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Al(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to four equivalent Rb(1) and one Al(1) atom. In the third F site, F(3) is bonded in a linear geometry to four equivalent Rb(1) and two equivalent Al(1) atoms.
Rb2AlOF5 crystallizes in the orthorhombic Cmcm space group. Rb(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent F(3), four equivalent F(1), and four equivalent F(2) atoms. There is one shorter (3.14 Å) and one longer (3.32 Å) Rb(1)-O(1) bond length. There is one shorter (3.09 Å) and one longer (3.32 Å) Rb(1)-F(3) bond length. There are two shorter (2.82 Å) and two longer (2.98 Å) Rb(1)-F(1) bond lengths. There are two shorter (3.00 Å) and two longer (3.24 Å) Rb(1)-F(2) bond lengths. Al(1) is bonded to two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles are 5°. Both Al(1)-F(1) bond lengths are 1.80 Å. Both Al(1)-F(2) bond lengths are 1.81 Å. Both Al(1)-F(3) bond lengths are 1.91 Å. O(1) is bonded in a distorted square co-planar geometry to four equivalent Rb(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Al(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to four equivalent Rb(1) and one Al(1) atom. In the third F site, F(3) is bonded in a linear geometry to four equivalent Rb(1) and two equivalent Al(1) atoms.