Materials Data on CsTm2Cl7 by Materials Project

CsTm2Cl7 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cs1+ is bonded in a 10-coordinate geometry to ten Cl1- atoms. There are a spread of Cs–Cl bond distances ranging from 3.55–3.84 Å. There are two inequivalent Tm3+ sites. In the first Tm3+ site, Tm3+ is bonded to seven Cl1- atoms to form a mixture of distorted edge and face-sharing TmCl7 pentagonal bipyramids. There are a spread of Tm–Cl bond distances ranging from 2.66–2.77 Å. In the second Tm3+ site, Tm3+ is bonded to seven Cl1- atoms to form a mixture of distorted edge and face-sharing TmCl7 pentagonal bipyramids. There are a spread of Tm–Cl bond distances ranging from 2.67–2.71 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Cs1+ and two Tm3+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted L-shaped geometry to one Cs1+ and two Tm3+ atoms. In the third Cl1- site, Cl1- is bonded in a distorted trigonal non-coplanar geometry to one Cs1+ and two Tm3+ atoms. In the fourth Cl1- site, Cl1- is bonded in a distorted water-like geometry to two equivalent Cs1+ and two Tm3+ atoms.