Materials Data on Er2GeRh3 by Materials Project
Er2Rh3Ge crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Er is bonded in a 9-coordinate geometry to nine equivalent Rh and three equivalent Ge atoms. There are three shorter (2.90 Å) and six longer (3.19 Å) Er–Rh bond lengths. All Er–Ge bond lengths are 3.26 Å. Rh is bonded to six equivalent Er, four equivalent Rh, and two equivalent Ge atoms to form distorted RhEr6Ge2Rh4 cuboctahedra that share corners with four equivalent GeEr6Rh6 cuboctahedra, corners with fourteen equivalent RhEr6Ge2Rh4 cuboctahedra, edges with six equivalent RhEr6Ge2Rh4 cuboctahedra, faces with six equivalent GeEr6Rh6 cuboctahedra, and faces with twelve equivalent RhEr6Ge2Rh4 cuboctahedra. All Rh–Rh bond lengths are 2.80 Å. Both Rh–Ge bond lengths are 2.55 Å. Ge is bonded to six equivalent Er and six equivalent Rh atoms to form distorted GeEr6Rh6 cuboctahedra that share corners with six equivalent GeEr6Rh6 cuboctahedra, corners with twelve equivalent RhEr6Ge2Rh4 cuboctahedra, edges with six equivalent GeEr6Rh6 cuboctahedra, and faces with eighteen equivalent RhEr6Ge2Rh4 cuboctahedra.