Materials Data on BaYCl5 by Materials Project

Abstract

BaYCl5 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Ba2+ is bonded to seven Cl1- atoms to form BaCl7 pentagonal bipyramids that share corners with four equivalent YCl6 octahedra, edges with two equivalent YCl6 octahedra, and edges with two equivalent BaCl7 pentagonal bipyramids. The corner-sharing octahedra tilt angles range from 2–38°. There are a spread of Ba–Cl bond distances ranging from 3.06–3.28 Å. Y3+ is bonded to six Cl1- atoms to form YCl6 octahedra that share corners with two equivalent YCl6 octahedra, corners with four equivalent BaCl7 pentagonal bipyramids, and edges with two equivalent BaCl7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 29°. There are a spread of Y–Cl bond distances ranging from 2.61–2.71 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a linear geometry to one Ba2+ and one Y3+ atom. In the second Cl1- site, Cl1- is bonded in a 3-coordinate geometry to two equivalent Ba2+ and one Y3+ atom. In the third Cl1- site, Cl1- is bonded in a 3-coordinate geometry to one Ba2+ and two equivalent Y3+ atoms.