Materials Data on Yb(FeSb3)4 by Materials Project

Abstract

YbFe4Sb12 crystallizes in the cubic Im-3 space group. The structure is three-dimensional. Yb3+ is bonded to twelve equivalent Sb+1.25- atoms to form YbSb12 cuboctahedra that share faces with eight equivalent FeSb6 octahedra. All Yb–Sb bond lengths are 3.41 Å. Fe3+ is bonded to six equivalent Sb+1.25- atoms to form FeSb6 octahedra that share corners with six equivalent FeSb6 octahedra and faces with two equivalent YbSb12 cuboctahedra. The corner-sharing octahedral tilt angles are 52°. All Fe–Sb bond lengths are 2.55 Å. Sb+1.25- is bonded in a 2-coordinate geometry to one Yb3+, two equivalent Fe3+, and two equivalent Sb+1.25- atoms. There are one shorter (2.98 Å) and one longer (3.05 Å) Sb–Sb bond lengths.