Materials Data on Tb2CoGe2 by Materials Project

Abstract

Tb2CoGe2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Tb sites. In the first Tb site, Tb is bonded in a 9-coordinate geometry to two equivalent Co and seven Ge atoms. There are one shorter (3.16 Å) and one longer (3.25 Å) Tb–Co bond lengths. There are a spread of Tb–Ge bond distances ranging from 2.89–3.11 Å. In the second Tb site, Tb is bonded in a 9-coordinate geometry to four equivalent Co and five Ge atoms. There are two shorter (2.88 Å) and two longer (3.15 Å) Tb–Co bond lengths. There are a spread of Tb–Ge bond distances ranging from 2.92–3.12 Å. Co is bonded in a 10-coordinate geometry to six Tb, one Co, and three Ge atoms. The Co–Co bond length is 2.52 Å. There are two shorter (2.44 Å) and one longer (2.58 Å) Co–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six Tb, two equivalent Co, and one Ge atom. The Ge–Ge bond length is 2.62 Å. In the second Ge site, Ge is bonded to six Tb and one Co atom to form distorted edge-sharing GeTb6Co pentagonal bipyramids.