Materials Data on Yb2Co17 by Materials Project
Yb2Co17 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Yb sites. In the first Yb site, Yb is bonded in a 12-coordinate geometry to eighteen Co atoms. There are a spread of Yb–Co bond distances ranging from 2.92–3.25 Å. In the second Yb site, Yb is bonded in a 2-coordinate geometry to twenty Co atoms. There are a spread of Yb–Co bond distances ranging from 2.88–3.12 Å. There are four inequivalent Co sites. In the first Co site, Co is bonded in a 2-coordinate geometry to one Yb and thirteen Co atoms. There are a spread of Co–Co bond distances ranging from 2.33–2.66 Å. In the second Co site, Co is bonded to two equivalent Yb and ten Co atoms to form CoYb2Co10 cuboctahedra that share corners with fourteen CoYb2Co10 cuboctahedra, edges with six equivalent CoYb3Co9 cuboctahedra, and faces with ten CoYb2Co10 cuboctahedra. All Co–Co bond lengths are 2.39 Å. In the third Co site, Co is bonded in a 12-coordinate geometry to two Yb and ten Co atoms. There are a spread of Co–Co bond distances ranging from 2.33–2.52 Å. In the fourth Co site, Co is bonded to three Yb and nine Co atoms to form a mixture of distorted face, edge, and corner-sharing CoYb3Co9 cuboctahedra. Both Co–Co bond lengths are 2.41 Å.