Materials Data on Er3(CoGe2)2 by Materials Project
Er3Co2Ge4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 12-coordinate geometry to four equivalent Co and eight Ge atoms. There are a spread of Er–Co bond distances ranging from 2.87–3.20 Å. There are a spread of Er–Ge bond distances ranging from 2.95–3.25 Å. In the second Er site, Er is bonded in a 6-coordinate geometry to eight Ge atoms. There are a spread of Er–Ge bond distances ranging from 2.97–3.32 Å. Co is bonded in a 4-coordinate geometry to four equivalent Er and four Ge atoms. There are a spread of Co–Ge bond distances ranging from 2.35–2.43 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 10-coordinate geometry to six Er, three equivalent Co, and one Ge atom. The Ge–Ge bond length is 2.96 Å. In the second Ge site, Ge is bonded in a 9-coordinate geometry to six Er, one Co, and two equivalent Ge atoms. Both Ge–Ge bond lengths are 2.71 Å.