Materials Data on AlH15(NF)6 by Materials Project
AlNH3F6(NH2)3(NH3)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is zero-dimensional and consists of twelve ammonia molecules, eight ammonia molecules, and four AlNH3F6 clusters. In each AlNH3F6 cluster, Al3+ is bonded in an octahedral geometry to six F1- atoms. There are a spread of Al–F bond distances ranging from 1.81–1.87 Å. N2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. There is one shorter (1.04 Å) and two longer (1.05 Å) N–H bond length. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N2- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N2- and one F1- atom. The H–F bond length is 1.63 Å. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Al3+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Al3+ atom. In the third F1- site, F1- is bonded in a distorted water-like geometry to one Al3+ and one H1+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Al3+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Al3+ atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one Al3+ atom.