Materials Data on Sm(DyS2)2 by Materials Project

Abstract

Sm(DyS2)2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Dy3+ is bonded to eight equivalent S2- atoms to form distorted DyS8 hexagonal bipyramids that share corners with four equivalent DyS8 hexagonal bipyramids, corners with four equivalent SmS8 hexagonal bipyramids, edges with four equivalent DyS8 hexagonal bipyramids, faces with four equivalent DyS8 hexagonal bipyramids, and faces with four equivalent SmS8 hexagonal bipyramids. There are a spread of Dy–S bond distances ranging from 2.77–3.01 Å. Sm2+ is bonded to eight equivalent S2- atoms to form distorted SmS8 hexagonal bipyramids that share corners with eight equivalent DyS8 hexagonal bipyramids, edges with four equivalent SmS8 hexagonal bipyramids, and faces with eight equivalent DyS8 hexagonal bipyramids. There are four shorter (2.83 Å) and four longer (3.00 Å) Sm–S bond lengths. S2- is bonded to four equivalent Dy3+ and two equivalent Sm2+ atoms to form a mixture of distorted edge, face, and corner-sharing SSm2Dy4 octahedra. The corner-sharing octahedra tilt angles range from 17–50°.