DOE OSTI2020
Tl2(O3I)3 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of one Tl2(O3I)3 ribbon oriented in the (-1, 1, 0) direction. there are three inequivalent Tl sites. In the first Tl site, Tl is bonded in a distorted square co-planar geometry to four O atoms. There are two shorter (2.86 Å) and two longer (2.87 Å) Tl–O bond lengths. In the second Tl site, Tl is bonded in a distorted single-bond geometry to one O atom. The Tl–O bond length is 2.77 Å. In the third Tl site, Tl is bonded in an octahedral geometry to six O atoms. There are a spread of Tl–O bond distances ranging from 2.24–2.34 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a distorted single-bond geometry to one I atom. The O–I bond length is 1.87 Å. In the second O site, O is bonded in a distorted single-bond geometry to one Tl and one I atom. The O–I bond length is 1.83 Å. In the third O site, O is bonded in a single-bond geometry to one Tl and one I atom. The O–I bond length is 1.83 Å. In the fourth O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.83 Å. In the fifth O site, O is bonded in a single-bond geometry to one Tl and one I atom. The O–I bond length is 1.84 Å. In the sixth O site, O is bonded in a single-bond geometry to one I atom. The O–I bond length is 1.82 Å. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to one Tl and one I atom. The O–I bond length is 1.88 Å. In the eighth O site, O is bonded in a distorted bent 120 degrees geometry to one Tl and one I atom. The O–I bond length is 1.89 Å. In the ninth O site, O is bonded in a bent 150 degrees geometry to one Tl and one I atom. The O–I bond length is 1.88 Å. There are three inequivalent I sites. In the first I site, I is bonded in a 6-coordinate geometry to three O atoms. In the second I site, I is bonded in a distorted trigonal non-coplanar geometry to three O atoms. In the third I site, I is bonded in a 3-coordinate geometry to three O atoms.