Materials Data on FeCoTe2 by Materials Project

Abstract

FeCoTe2 is Caswellsilverite-like structured and crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Fe2+ is bonded to six equivalent Te2- atoms to form FeTe6 octahedra that share corners with twelve equivalent CoTe6 octahedra, edges with six equivalent FeTe6 octahedra, and faces with two equivalent CoTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Fe–Te bond lengths are 2.60 Å. Co2+ is bonded to six equivalent Te2- atoms to form CoTe6 octahedra that share corners with twelve equivalent FeTe6 octahedra, edges with six equivalent CoTe6 octahedra, and faces with two equivalent FeTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Co–Te bond lengths are 2.61 Å. Te2- is bonded in a 6-coordinate geometry to three equivalent Fe2+ and three equivalent Co2+ atoms.