Materials Data on Yb2SmS4 by Materials Project

Abstract

Yb2SmS4 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Yb+2.50+ is bonded to eight equivalent S2- atoms to form distorted YbS8 hexagonal bipyramids that share corners with four equivalent YbS8 hexagonal bipyramids, corners with four equivalent SmS8 hexagonal bipyramids, edges with four equivalent YbS8 hexagonal bipyramids, faces with four equivalent YbS8 hexagonal bipyramids, and faces with four equivalent SmS8 hexagonal bipyramids. There are a spread of Yb–S bond distances ranging from 2.82–3.06 Å. Sm3+ is bonded to eight equivalent S2- atoms to form distorted SmS8 hexagonal bipyramids that share corners with eight equivalent YbS8 hexagonal bipyramids, edges with four equivalent SmS8 hexagonal bipyramids, and faces with eight equivalent YbS8 hexagonal bipyramids. There are four shorter (2.85 Å) and four longer (2.93 Å) Sm–S bond lengths. S2- is bonded in a 6-coordinate geometry to four equivalent Yb+2.50+ and two equivalent Sm3+ atoms.