Materials Data on Er2SiGe by Materials Project
Er2GeSi crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 5-coordinate geometry to three equivalent Ge and four equivalent Si atoms. There are one shorter (2.96 Å) and two longer (3.15 Å) Er–Ge bond lengths. All Er–Si bond lengths are 2.94 Å. In the second Er site, Er is bonded in a 5-coordinate geometry to four equivalent Ge and three equivalent Si atoms. All Er–Ge bond lengths are 2.94 Å. There are one shorter (2.94 Å) and two longer (3.16 Å) Er–Si bond lengths. Ge is bonded in a 9-coordinate geometry to seven Er and two equivalent Si atoms. Both Ge–Si bond lengths are 2.58 Å. Si is bonded in a 9-coordinate geometry to seven Er and two equivalent Ge atoms.