Materials Data on CsTlF3 by Materials Project

Abstract

CsTlF3 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs is bonded to twelve equivalent F atoms to form CsF12 cuboctahedra that share corners with twelve equivalent CsF12 cuboctahedra, faces with six equivalent CsF12 cuboctahedra, and faces with eight TlF6 octahedra. All Cs–F bond lengths are 3.46 Å. There are two inequivalent Tl sites. In the first Tl site, Tl is bonded to six equivalent F atoms to form TlF6 octahedra that share corners with six equivalent TlF6 octahedra and faces with eight equivalent CsF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Tl–F bond lengths are 2.67 Å. In the second Tl site, Tl is bonded to six equivalent F atoms to form TlF6 octahedra that share corners with six equivalent TlF6 octahedra and faces with eight equivalent CsF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Tl–F bond lengths are 2.21 Å. F is bonded in a 6-coordinate geometry to four equivalent Cs and two Tl atoms.