Materials Data on ErCd2 by Materials Project

Abstract

ErCd2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Er is bonded to two equivalent Er and six equivalent Cd atoms to form ErEr2Cd6 hexagonal bipyramids that share corners with two equivalent ErEr2Cd6 hexagonal bipyramids, corners with six equivalent CdEr3Cd5 hexagonal bipyramids, edges with six equivalent ErEr2Cd6 hexagonal bipyramids, and edges with eighteen equivalent CdEr3Cd5 hexagonal bipyramids. Both Er–Er bond lengths are 3.21 Å. All Er–Cd bond lengths are 3.15 Å. Cd is bonded to three equivalent Er and five equivalent Cd atoms to form distorted CdEr3Cd5 hexagonal bipyramids that share corners with three equivalent ErEr2Cd6 hexagonal bipyramids, corners with five equivalent CdEr3Cd5 hexagonal bipyramids, edges with nine equivalent ErEr2Cd6 hexagonal bipyramids, and edges with fifteen equivalent CdEr3Cd5 hexagonal bipyramids. There are three shorter (3.16 Å) and two longer (3.21 Å) Cd–Cd bond lengths.