Materials Data on HI3 by Materials Project
HI3 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of two HI3 clusters. H is bonded in a single-bond geometry to one I atom. The H–I bond length is 1.65 Å. There are three inequivalent I sites. In the first I site, I is bonded in a 2-coordinate geometry to one I atom. The I–I bond length is 2.72 Å. In the second I site, I is bonded in a single-bond geometry to one H and one I atom. The I–I bond length is 3.45 Å. In the third I site, I is bonded in a bent 150 degrees geometry to two I atoms.
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