Materials Data on Ta2Hg2F11 by Materials Project

Abstract

Ta2Hg2F11 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Ta+3.50+ sites. In the first Ta+3.50+ site, Ta+3.50+ is bonded to six F1- atoms to form corner-sharing TaF6 octahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of Ta–F bond distances ranging from 1.88–2.09 Å. In the second Ta+3.50+ site, Ta+3.50+ is bonded to six F1- atoms to form corner-sharing TaF6 octahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of Ta–F bond distances ranging from 1.87–2.11 Å. There are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a 5-coordinate geometry to one Hg2+ and three F1- atoms. The Hg–Hg bond length is 2.74 Å. There are a spread of Hg–F bond distances ranging from 2.81–2.96 Å. In the second Hg2+ site, Hg2+ is bonded in a 4-coordinate geometry to two Hg2+ and two F1- atoms. The Hg–Hg bond length is 2.68 Å. Both Hg–F bond lengths are 3.08 Å. There are eleven inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted single-bond geometry to one Ta+3.50+ and one Hg2+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ and one Hg2+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ and one Hg2+ atom. In the sixth F1- site, F1- is bonded in a distorted single-bond geometry to one Ta+3.50+ and one Hg2+ atom. In the seventh F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ atom. In the eighth F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ atom. In the ninth F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ and one Hg2+ atom. In the tenth F1- site, F1- is bonded in a single-bond geometry to one Ta+3.50+ atom. In the eleventh F1- site, F1- is bonded in a bent 150 degrees geometry to two Ta+3.50+ atoms.