Materials Data on AlI3 by Materials Project
AlI3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two ac1mi10q molecules. Al3+ is bonded to four I1- atoms to form edge-sharing AlI4 tetrahedra. There are a spread of Al–I bond distances ranging from 2.49–2.68 Å. There are three inequivalent I1- sites. In the first I1- site, I1- is bonded in a single-bond geometry to one Al3+ atom. In the second I1- site, I1- is bonded in a single-bond geometry to one Al3+ atom. In the third I1- site, I1- is bonded in an L-shaped geometry to two equivalent Al3+ atoms.
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