Materials Data on YbIO9 by Materials Project
YbO9I crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Yb is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Yb–O bond distances ranging from 2.35–2.74 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a water-like geometry to one Yb and one I atom. The O–I bond length is 1.85 Å. In the second O site, O is bonded in a bent 120 degrees geometry to one O and one I atom. The O–O bond length is 1.28 Å. The O–I bond length is 2.23 Å. In the third O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Yb and one I atom. The O–I bond length is 1.90 Å. In the fourth O site, O is bonded in an L-shaped geometry to one Yb and one O atom. The O–O bond length is 1.29 Å. In the fifth O site, O is bonded in a bent 120 degrees geometry to two O atoms. The O–O bond length is 1.30 Å. In the sixth O site, O is bonded in a water-like geometry to one Yb and one I atom. The O–I bond length is 1.85 Å. In the seventh O site, O is bonded in a bent 120 degrees geometry to one Yb and one O atom. In the eighth O site, O is bonded in a water-like geometry to one Yb and one O atom. In the ninth O site, O is bonded in a water-like geometry to one Yb and one I atom. The O–I bond length is 1.85 Å. I is bonded in a square pyramidal geometry to five O atoms.