Materials Data on Er3Ge4 by Materials Project
Er3Ge4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 8-coordinate geometry to eight Ge atoms. There are a spread of Er–Ge bond distances ranging from 2.97–3.08 Å. In the second Er site, Er is bonded in a 5-coordinate geometry to seven Ge atoms. There are a spread of Er–Ge bond distances ranging from 2.87–3.16 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 9-coordinate geometry to six Er and three Ge atoms. There are one shorter (2.61 Å) and two longer (2.84 Å) Ge–Ge bond lengths. In the second Ge site, Ge is bonded in a 9-coordinate geometry to seven Er and two equivalent Ge atoms. In the third Ge site, Ge is bonded in a 4-coordinate geometry to four equivalent Er and four equivalent Ge atoms.