Materials Data on Y4CI5 by Materials Project

Abstract

Y4CI5 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Y sites. In the first Y site, Y is bonded in a 1-coordinate geometry to one C and five I atoms. The Y–C bond length is 2.40 Å. There are a spread of Y–I bond distances ranging from 3.06–3.88 Å. In the second Y site, Y is bonded to two equivalent C and four I atoms to form a mixture of distorted edge and corner-sharing YC2I4 octahedra. The corner-sharing octahedral tilt angles are 0°. Both Y–C bond lengths are 2.57 Å. There are a spread of Y–I bond distances ranging from 3.13–3.33 Å. C is bonded to six Y atoms to form edge-sharing CY6 octahedra. There are three inequivalent I sites. In the first I site, I is bonded in a 3-coordinate geometry to three Y atoms. In the second I site, I is bonded in a 4-coordinate geometry to four Y atoms. In the third I site, I is bonded in a distorted rectangular see-saw-like geometry to four equivalent Y atoms.