Materials Data on Ta2Tl2P7HO24 by Materials Project

Abstract

Tl2Ta2(PO4)2(HP5O16) crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with six PO4 tetrahedra. There are a spread of Ta–O bond distances ranging from 1.95–2.00 Å. There are two inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Tl–O bond distances ranging from 2.83–3.18 Å. In the second Tl1+ site, Tl1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Tl–O bond distances ranging from 2.90–3.22 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share a cornercorner with one TaO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of P–O bond distances ranging from 1.47–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form corner-sharing PO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.48–1.60 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with three equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 22–37°. There are a spread of P–O bond distances ranging from 1.49–1.58 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent TaO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 4–23°. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are thirteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one Tl1+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Ta5+ and one P5+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Tl1+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a linear geometry to one Ta5+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ta5+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a linear geometry to one Ta5+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to three Tl1+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the ninth O2- site, O2- is bonded in a single-bond geometry to three Tl1+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a bent 120 degrees geometry to two P5+ atoms. In the eleventh O2- site, O2- is bonded in a bent 120 degrees geometry to one P5+ and one H1+ atom. In the twelfth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ta5+ and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ta5+ and one P5+ atom.