DOI: 10.17188/1754386
title: Materials Data on CsTaV2O8 by Materials Project

description: CsTaV2O8 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Cs–O bond distances ranging from 3.05–3.54 Å. In the second Cs1+ site, Cs1+ is bonded in a 1-coordinate geometry to nine O2- atoms. There are a spread of Cs–O bond distances ranging from 3.07–3.56 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five VO4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. There are a spread of Ta–O bond distances ranging from 1.94–2.03 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share a cornercorner with one TaO6 octahedra and corners with five VO4 tetrahedra. The corner-sharing octahedral tilt angles are 9°. There are a spread of Ta–O bond distances ranging from 1.94–2.03 Å. There are four inequivalent V5+ sites. In the first V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with three equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 13–23°. There are a spread of V–O bond distances ranging from 1.66–1.78 Å. In the second V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with three equivalent TaO6 octahedra. The corner-sharing octahedra tilt angles range from 7–21°. There are a spread of V–O bond distances ranging from 1.66–1.79 Å. In the third V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with two equivalent TaO6 octahedra and a cornercorner with one VO4 tetrahedra. The corner-sharing octahedral tilt angles are 38°. There are a spread of V–O bond distances ranging from 1.64–1.83 Å. In the fourth V5+ site, V5+ is bonded to four O2- atoms to form VO4 tetrahedra that share corners with two equivalent TaO6 octahedra and a cornercorner with one VO4 tetrahedra. The corner-sharing octahedral tilt angles are 29°. There are a spread of V–O bond distances ranging from 1.64–1.81 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to one Ta5+ and one V5+ atom. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+, one Ta5+, and one V5+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Cs1+ and one V5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Cs1+ and one V5+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one V5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Cs1+ and two V5+ atoms. In the seventh O2- site, O2- is bonded in a single-bond geometry to two equivalent Cs1+ and one V5+ atom. In the eighth O2- site, O2- is bonded in a linear geometry to one Cs1+, one Ta5+, and one V5+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ta5+ and one V5+ atom. In the tenth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cs1+, one Ta5+, and one V5+ atom. In the eleventh O2- site, O2- is bonded in a linear geometry to two Ta5+ atoms. In the twelfth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+, one Ta5+, and one V5+ atom.