Materials Data on Rb7NaGe8 by Materials Project

Abstract

Rb7NaGe8 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. there are two inequivalent Rb sites. In the first Rb site, Rb is bonded in a 6-coordinate geometry to six Ge atoms. There are a spread of Rb–Ge bond distances ranging from 3.57–3.83 Å. In the second Rb site, Rb is bonded in a distorted octahedral geometry to six equivalent Ge atoms. All Rb–Ge bond lengths are 4.13 Å. Na is bonded in a 6-coordinate geometry to six equivalent Ge atoms. All Na–Ge bond lengths are 3.02 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six equivalent Rb and three equivalent Ge atoms. All Ge–Ge bond lengths are 2.57 Å. In the second Ge site, Ge is bonded in a 1-coordinate geometry to five Rb, one Na, and three Ge atoms. Both Ge–Ge bond lengths are 2.66 Å.