YbO9I crystallizes in the monoclinic P2_1/c space group. Yb(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(1) atoms. There are nine inequivalent O sites. In the first O site, O(7) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. In the second O site, O(8) is bonded in a bent 120 degrees geometry to one O(4) and one I(1) atom. In the third O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Yb(1) and one I(1) atom. In the fourth O site, O(9) is bonded in an L-shaped geometry to one Yb(1) and one O(2) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to one O(5) and one O(9) atom. In the sixth O site, O(3) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to one Yb(1) and one O(8) atom. In the eighth O site, O(5) is bonded in a water-like geometry to one Yb(1) and one O(2) atom. In the ninth O site, O(6) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. I(1) is bonded in a square pyramidal geometry to one O(1), one O(3), one O(6), one O(7), and one O(8) atom.
YbO9I crystallizes in the monoclinic P2_1/c space group. Yb(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), one O(7), one O(9), and two equivalent O(1) atoms. The Yb(1)-O(3) bond length is 2.47 Å. The Yb(1)-O(4) bond length is 2.62 Å. The Yb(1)-O(5) bond length is 2.60 Å. The Yb(1)-O(6) bond length is 2.35 Å. The Yb(1)-O(7) bond length is 2.40 Å. The Yb(1)-O(9) bond length is 2.74 Å. There is one shorter (2.38 Å) and one longer (2.49 Å) Yb(1)-O(1) bond length. There are nine inequivalent O sites. In the first O site, O(7) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. The O(7)-I(1) bond length is 1.85 Å. In the second O site, O(8) is bonded in a bent 120 degrees geometry to one O(4) and one I(1) atom. The O(8)-O(4) bond length is 1.28 Å. The O(8)-I(1) bond length is 2.23 Å. In the third O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Yb(1) and one I(1) atom. The O(1)-I(1) bond length is 1.90 Å. In the fourth O site, O(9) is bonded in an L-shaped geometry to one Yb(1) and one O(2) atom. The O(9)-O(2) bond length is 1.29 Å. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to one O(5) and one O(9) atom. The O(2)-O(5) bond length is 1.30 Å. In the sixth O site, O(3) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. The O(3)-I(1) bond length is 1.85 Å. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to one Yb(1) and one O(8) atom. In the eighth O site, O(5) is bonded in a water-like geometry to one Yb(1) and one O(2) atom. In the ninth O site, O(6) is bonded in a water-like geometry to one Yb(1) and one I(1) atom. The O(6)-I(1) bond length is 1.85 Å. I(1) is bonded in a square pyramidal geometry to one O(1), one O(3), one O(6), one O(7), and one O(8) atom.