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3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Tl2O3 by Materials Project

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.

36 MATERIALS SCIENCE↗
NASA NTRS1989

Preparation of high T(c) Tl-Ba-Ca-Cu-O thin films by pulsed laser evaporation and Tl2O3 vapor processing

Tl-Ba-Ca-Cu-O superconducting thin films with zero-resistance temperatures up to 115 K have been prepared using a Tl2O3 vapor process on Ba-Ca-Cu-O precursor thin films. The Ba-Ca-Cu-O thin films were made by laser deposition on Y-stabilized ZrO2 substrates. This technique minimizes problems caused by the toxicity of Tl2O3, and its subsequent decomposition to the volatile and toxic Tl2O upon heating. Therefore, it may have practical application in the fabrication of high T(c) Tl-Ba-Ca-Cu-O superconducting thin-film devices.

Johs, B.↗
DOE OSTI2020

Materials Data on Tl2O3 by Materials Project

Tl2O3 is Corundum-like structured and crystallizes in the cubic Ia-3 space group. The structure is three-dimensional. there are two inequivalent Tl3+ sites. In the first Tl3+ site, Tl3+ is bonded to six equivalent O2- atoms to form a mixture of distorted edge and corner-sharing TlO6 octahedra. The corner-sharing octahedra tilt angles range from 54–56°. There are a spread of Tl–O bond distances ranging from 2.26–2.36 Å. In the second Tl3+ site, Tl3+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing TlO6 octahedra. The corner-sharing octahedral tilt angles are 54°. All Tl–O bond lengths are 2.31 Å. O2- is bonded to four Tl3+ atoms to form a mixture of distorted edge and corner-sharing OTl4 trigonal pyramids.

36 MATERIALS SCIENCE↗