CsBe2BO3F2 crystallizes in the trigonal R32 space group. Cs(1) is bonded to six equivalent F(1) atoms to form CsF6 octahedra that share corners with six equivalent Be(1)O3F tetrahedra and edges with six equivalent Cs(1)F6 octahedra. Be(1) is bonded to three equivalent O(1) and one F(1) atom to form BeO3F tetrahedra that share corners with three equivalent Cs(1)F6 octahedra and corners with three equivalent Be(1)O3F tetrahedra. The corner-sharing octahedral tilt angles are 59°. B(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. O(1) is bonded in a trigonal planar geometry to two equivalent Be(1) and one B(1) atom. F(1) is bonded in a single-bond geometry to three equivalent Cs(1) and one Be(1) atom.
CsBe2BO3F2 crystallizes in the trigonal R32 space group. Cs(1) is bonded to six equivalent F(1) atoms to form CsF6 octahedra that share corners with six equivalent Be(1)O3F tetrahedra and edges with six equivalent Cs(1)F6 octahedra. All Cs(1)-F(1) bond lengths are 3.03 Å. Be(1) is bonded to three equivalent O(1) and one F(1) atom to form BeO3F tetrahedra that share corners with three equivalent Cs(1)F6 octahedra and corners with three equivalent Be(1)O3F tetrahedra. The corner-sharing octahedral tilt angles are 59°. All Be(1)-O(1) bond lengths are 1.65 Å. The Be(1)-F(1) bond length is 1.56 Å. B(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. All B(1)-O(1) bond lengths are 1.38 Å. O(1) is bonded in a trigonal planar geometry to two equivalent Be(1) and one B(1) atom. F(1) is bonded in a single-bond geometry to three equivalent Cs(1) and one Be(1) atom.