Materials Data on Zr(CoGe)6 by Materials Project

Abstract

Zr(CoGe)6 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Zr is bonded to twelve equivalent Co and eight Ge atoms to form distorted face-sharing ZrCo12Ge8 hexagonal bipyramids. All Zr–Co bond lengths are 3.20 Å. There are two shorter (2.64 Å) and six longer (2.93 Å) Zr–Ge bond lengths. Co is bonded in a 12-coordinate geometry to two equivalent Zr, four equivalent Co, and six Ge atoms. All Co–Co bond lengths are 2.54 Å. There are four shorter (2.43 Å) and two longer (2.63 Å) Co–Ge bond lengths. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 6-coordinate geometry to six equivalent Co atoms. In the second Ge site, Ge is bonded in a 8-coordinate geometry to one Zr, six equivalent Co, and one Ge atom. The Ge–Ge bond length is 2.49 Å. In the third Ge site, Ge is bonded in a 12-coordinate geometry to three equivalent Zr and six equivalent Co atoms.