AlF3 is alpha Rhenium trioxide-like structured and crystallizes in the trigonal P321 space group. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles are 3°. In the second Al site, Al(2) is bonded to three equivalent F(1) and three equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Al(2) atoms. In the second F site, F(2) is bonded in a linear geometry to one Al(1) and one Al(2) atom.
AlF3 is alpha Rhenium trioxide-like structured and crystallizes in the trigonal P321 space group. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to six equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles are 3°. All Al(1)-F(2) bond lengths are 1.82 Å. In the second Al site, Al(2) is bonded to three equivalent F(1) and three equivalent F(2) atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. All Al(2)-F(1) bond lengths are 1.82 Å. All Al(2)-F(2) bond lengths are 1.82 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to two equivalent Al(2) atoms. In the second F site, F(2) is bonded in a linear geometry to one Al(1) and one Al(2) atom.