Materials Data on Yb2CuGe6 by Materials Project
Yb2CuGe6 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Yb is bonded to two equivalent Cu and ten Ge atoms to form a mixture of distorted edge, face, and corner-sharing YbCu2Ge10 cuboctahedra. There are one shorter (3.17 Å) and one longer (3.19 Å) Yb–Cu bond lengths. There are a spread of Yb–Ge bond distances ranging from 3.00–3.35 Å. Cu is bonded in a 9-coordinate geometry to four equivalent Yb and five Ge atoms. There are a spread of Cu–Ge bond distances ranging from 2.43–2.52 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded in a 6-coordinate geometry to two equivalent Yb, one Cu, and three Ge atoms. There are one shorter (2.54 Å) and two longer (2.58 Å) Ge–Ge bond lengths. In the second Ge site, Ge is bonded in a 6-coordinate geometry to two equivalent Yb, one Cu, and three Ge atoms. There are one shorter (2.54 Å) and two longer (2.58 Å) Ge–Ge bond lengths. In the third Ge site, Ge is bonded in a 8-coordinate geometry to six equivalent Yb and two Ge atoms. There are one shorter (2.52 Å) and one longer (2.61 Å) Ge–Ge bond lengths. In the fourth Ge site, Ge is bonded in a 9-coordinate geometry to six equivalent Yb, one Cu, and two Ge atoms. The Ge–Ge bond length is 2.47 Å. In the fifth Ge site, Ge is bonded in a 6-coordinate geometry to two equivalent Yb, one Cu, and three Ge atoms. The Ge–Ge bond length is 2.52 Å.