ZnAlH4O2F5 crystallizes in the orthorhombic Imma space group. Zn(1) is bonded to two equivalent O(1) and four equivalent F(1) atoms to form distorted ZnO2F4 octahedra that share corners with four equivalent Al(1)F6 octahedra. The corner-sharing octahedral tilt angles are 40°. Al(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form AlF6 octahedra that share corners with two equivalent Al(1)F6 octahedra and corners with four equivalent Zn(1)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 30-40°. H(1) is bonded in a single-bond geometry to one O(1) atom. O(1) is bonded in a water-like geometry to one Zn(1) and two equivalent H(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one Al(1) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Al(1) atoms.
ZnAlH4O2F5 crystallizes in the orthorhombic Imma space group. Zn(1) is bonded to two equivalent O(1) and four equivalent F(1) atoms to form distorted ZnO2F4 octahedra that share corners with four equivalent Al(1)F6 octahedra. The corner-sharing octahedral tilt angles are 40°. Both Zn(1)-O(1) bond lengths are 2.07 Å. All Zn(1)-F(1) bond lengths are 2.12 Å. Al(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form AlF6 octahedra that share corners with two equivalent Al(1)F6 octahedra and corners with four equivalent Zn(1)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 30-40°. Both Al(1)-F(2) bond lengths are 1.88 Å. All Al(1)-F(1) bond lengths are 1.84 Å. H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.98 Å. O(1) is bonded in a water-like geometry to one Zn(1) and two equivalent H(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one Al(1) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to two equivalent Al(1) atoms.