SFLu crystallizes in the trigonal R-3m space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to six equivalent S(1) atoms to form LuS6 octahedra that share corners with six equivalent Lu(2)S2F6 hexagonal bipyramids and edges with six equivalent Lu(1)S6 octahedra. In the second Lu site, Lu(2) is bonded to two equivalent S(1) and six equivalent F(1) atoms to form LuS2F6 hexagonal bipyramids that share corners with six equivalent Lu(1)S6 octahedra and edges with six equivalent Lu(2)S2F6 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 58°. S(1) is bonded to one Lu(2) and three equivalent Lu(1) atoms to form a mixture of distorted corner and edge-sharing SLu4 trigonal pyramids. F(1) is bonded in a trigonal planar geometry to three equivalent Lu(2) atoms.
SFLu crystallizes in the trigonal R-3m space group. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to six equivalent S(1) atoms to form LuS6 octahedra that share corners with six equivalent Lu(2)S2F6 hexagonal bipyramids and edges with six equivalent Lu(1)S6 octahedra. All Lu(1)-S(1) bond lengths are 2.67 Å. In the second Lu site, Lu(2) is bonded to two equivalent S(1) and six equivalent F(1) atoms to form LuS2F6 hexagonal bipyramids that share corners with six equivalent Lu(1)S6 octahedra and edges with six equivalent Lu(2)S2F6 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 58°. Both Lu(2)-S(1) bond lengths are 2.68 Å. All Lu(2)-F(1) bond lengths are 2.27 Å. S(1) is bonded to one Lu(2) and three equivalent Lu(1) atoms to form a mixture of distorted corner and edge-sharing SLu4 trigonal pyramids. F(1) is bonded in a trigonal planar geometry to three equivalent Lu(2) atoms.