Materials Data on CsI4 by Materials Project

Abstract

CsI4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Cs is bonded in a 9-coordinate geometry to ten I atoms. There are a spread of Cs–I bond distances ranging from 3.99–4.49 Å. There are four inequivalent I sites. In the first I site, I is bonded in a 5-coordinate geometry to three equivalent Cs and two I atoms. There are one shorter (2.85 Å) and one longer (3.34 Å) I–I bond lengths. In the second I site, I is bonded to three equivalent Cs and two I atoms to form a mixture of distorted edge and corner-sharing ICs3I2 trigonal bipyramids. The I–I bond length is 3.02 Å. In the third I site, I is bonded in a 3-coordinate geometry to one Cs and two I atoms. The I–I bond length is 2.90 Å. In the fourth I site, I is bonded in a 4-coordinate geometry to three equivalent Cs and one I atom.