Materials Data on Mg(CoGe)6 by Materials Project
Mg(CoGe)6 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Mg is bonded in a 8-coordinate geometry to twelve equivalent Co and eight Ge atoms. All Mg–Co bond lengths are 3.19 Å. There are two shorter (2.60 Å) and six longer (2.93 Å) Mg–Ge bond lengths. Co is bonded in a 12-coordinate geometry to two equivalent Mg, four equivalent Co, and six Ge atoms. All Co–Co bond lengths are 2.54 Å. There are four shorter (2.42 Å) and two longer (2.62 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 12-coordinate geometry to three equivalent Mg and six equivalent Co atoms. In the third Ge site, Ge is bonded in a 8-coordinate geometry to one Mg, six equivalent Co, and one Ge atom. The Ge–Ge bond length is 2.51 Å.