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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Tl2WO4 by Materials Project

Tl2WO4 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. W6+ is bonded to four O2- atoms to form WO4 tetrahedra that share corners with three equivalent TlO6 octahedra. The corner-sharing octahedral tilt angles are 25°. All W–O bond lengths are 1.82 Å. There are three inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a distorted single-bond geometry to one O2- atom. The Tl–O bond length is 2.42 Å. In the second Tl1+ site, Tl1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Tl–O bond lengths are 2.98 Å. In the third Tl1+ site, Tl1+ is bonded to six equivalent O2- atoms to form distorted TlO6 octahedra that share corners with six equivalent WO4 tetrahedra. All Tl–O bond lengths are 2.85 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one W6+ and two Tl1+ atoms. In the second O2- site, O2- is bonded in a linear geometry to one W6+ and one Tl1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tl(WO3)6 by Materials Project

Tl(WO3)6 crystallizes in the trigonal P-31m space group. The structure is three-dimensional. W+5.83+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six equivalent WO6 octahedra and edges with two equivalent TlO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–29°. There is four shorter (1.93 Å) and two longer (1.96 Å) W–O bond length. Tl1+ is bonded to twelve equivalent O2- atoms to form TlO12 cuboctahedra that share edges with twelve equivalent WO6 octahedra. All Tl–O bond lengths are 3.37 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent W+5.83+ and one Tl1+ atom. In the second O2- site, O2- is bonded in a linear geometry to two equivalent W+5.83+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two equivalent W+5.83+ atoms.

36 MATERIALS SCIENCE↗