Materials Data on Eu2Ge3Au by Materials Project

Abstract

Eu2AuGe3 is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Eu is bonded to three equivalent Au and nine Ge atoms to form a mixture of face and edge-sharing EuGe9Au3 cuboctahedra. All Eu–Au bond lengths are 3.32 Å. There are three shorter (3.32 Å) and six longer (3.37 Å) Eu–Ge bond lengths. Au is bonded in a 3-coordinate geometry to six equivalent Eu and three equivalent Ge atoms. All Au–Ge bond lengths are 2.53 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Ge atoms. All Ge–Ge bond lengths are 2.53 Å. In the second Ge site, Ge is bonded in a distorted trigonal planar geometry to six equivalent Eu and three equivalent Au atoms. In the third Ge site, Ge is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Ge atoms.