Materials Data on EuGe7Ir3 by Materials Project

Abstract

EuIr3Ge7 crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Eu is bonded in a 12-coordinate geometry to six equivalent Ir and twelve equivalent Ge atoms. All Eu–Ir bond lengths are 3.24 Å. There are six shorter (3.29 Å) and six longer (3.30 Å) Eu–Ge bond lengths. Ir is bonded in a 9-coordinate geometry to two equivalent Eu and seven Ge atoms. There are a spread of Ir–Ge bond distances ranging from 2.53–2.65 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a trigonal planar geometry to three equivalent Ir and six equivalent Ge atoms. All Ge–Ge bond lengths are 2.89 Å. In the second Ge site, Ge is bonded in a 3-coordinate geometry to two equivalent Eu, three equivalent Ir, and five Ge atoms. There are a spread of Ge–Ge bond distances ranging from 2.79–2.91 Å.