Materials Data on AlF3 by Materials Project
AlF3 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six F1- atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedra tilt angles range from 0–32°. There are a spread of Al–F bond distances ranging from 1.80–1.85 Å. In the second Al3+ site, Al3+ is bonded to six F1- atoms to form corner-sharing AlF6 octahedra. The corner-sharing octahedra tilt angles range from 0–29°. There is four shorter (1.81 Å) and two longer (1.82 Å) Al–F bond length. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to two Al3+ atoms. In the second F1- site, F1- is bonded in a linear geometry to two equivalent Al3+ atoms. In the third F1- site, F1- is bonded in a linear geometry to two equivalent Al3+ atoms. In the fourth F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent Al3+ atoms. In the fifth F1- site, F1- is bonded in a linear geometry to two equivalent Al3+ atoms.