(Cs2ICl6)2F2 crystallizes in the cubic Fm-3m space group. The structure consists of four hydrofluoric acid atoms inside a Cs2ICl6 framework. In the Cs2ICl6 framework, Cs(1) is bonded to twelve equivalent Cl(1) atoms to form CsCl12 cuboctahedra that share corners with twelve equivalent Cs(1)Cl12 cuboctahedra, faces with six equivalent Cs(1)Cl12 cuboctahedra, and faces with four equivalent I(1)Cl6 octahedra. I(1) is bonded to six equivalent Cl(1) atoms to form ICl6 octahedra that share faces with eight equivalent Cs(1)Cl12 cuboctahedra. Cl(1) is bonded to four equivalent Cs(1) and one I(1) atom to form a mixture of corner, edge, and face-sharing ClCs4I square pyramids.
(Cs2ICl6)2F2 crystallizes in the cubic Fm-3m space group. The structure consists of four hydrofluoric acid atoms inside a Cs2ICl6 framework. In the Cs2ICl6 framework, Cs(1) is bonded to twelve equivalent Cl(1) atoms to form CsCl12 cuboctahedra that share corners with twelve equivalent Cs(1)Cl12 cuboctahedra, faces with six equivalent Cs(1)Cl12 cuboctahedra, and faces with four equivalent I(1)Cl6 octahedra. All Cs(1)-Cl(1) bond lengths are 3.77 Å. I(1) is bonded to six equivalent Cl(1) atoms to form ICl6 octahedra that share faces with eight equivalent Cs(1)Cl12 cuboctahedra. All I(1)-Cl(1) bond lengths are 2.56 Å. Cl(1) is bonded to four equivalent Cs(1) and one I(1) atom to form a mixture of corner, edge, and face-sharing ClCs4I square pyramids.