Materials Data on Co7Ge4 by Materials Project

Co7Ge4 crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. there are four inequivalent Co sites. In the first Co site, Co is bonded in a 11-coordinate geometry to five Co and six Ge atoms. There are a spread of Co–Co bond distances ranging from 2.38–2.61 Å. There are three shorter (2.59 Å) and three longer (2.64 Å) Co–Ge bond lengths. In the second Co site, Co is bonded in a 8-coordinate geometry to eight Co and six Ge atoms. There are a spread of Co–Co bond distances ranging from 2.49–2.64 Å. All Co–Ge bond lengths are 2.62 Å. In the third Co site, Co is bonded to six equivalent Co and five Ge atoms to form a mixture of distorted corner and face-sharing CoCo6Ge5 trigonal bipyramids. There are three shorter (2.30 Å) and two longer (2.49 Å) Co–Ge bond lengths. In the fourth Co site, Co is bonded to six Co and five Ge atoms to form a mixture of distorted corner and face-sharing CoCo6Ge5 trigonal bipyramids. There are a spread of Co–Ge bond distances ranging from 2.30–2.54 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 10-coordinate geometry to ten Co atoms. In the second Ge site, Ge is bonded in a 8-coordinate geometry to eight Co atoms. In the third Ge site, Ge is bonded in a 11-coordinate geometry to eleven Co atoms.