Materials Data on Tl2O3 by Materials Project

Abstract

Tl2O3 crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three Tl2O3 sheets oriented in the (0, 0, 1) direction. there are two inequivalent Tl3+ sites. In the first Tl3+ site, Tl3+ is bonded to six O2- atoms to form edge-sharing TlO6 octahedra. There are three shorter (2.21 Å) and three longer (2.55 Å) Tl–O bond lengths. In the second Tl3+ site, Tl3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Tl–O bond distances ranging from 2.19–2.76 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal non-coplanar geometry to three equivalent Tl3+ atoms. In the second O2- site, O2- is bonded to six Tl3+ atoms to form edge-sharing OTl6 octahedra. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to four equivalent Tl3+ atoms.