Materials Data on EuS3 by Materials Project
EuS3 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Eu2+ is bonded to twelve S+0.67- atoms to form distorted EuS12 cuboctahedra that share corners with four equivalent EuS12 cuboctahedra, edges with eight equivalent EuS12 cuboctahedra, edges with sixteen equivalent SEu4S8 cuboctahedra, faces with four equivalent EuS12 cuboctahedra, and faces with eight equivalent SEu4S8 cuboctahedra. There are four shorter (2.77 Å) and eight longer (3.20 Å) Eu–S bond lengths. There are two inequivalent S+0.67- sites. In the first S+0.67- site, S+0.67- is bonded to four equivalent Eu2+ and eight S+0.67- atoms to form distorted SEu4S8 cuboctahedra that share corners with twelve equivalent SEu4S8 cuboctahedra, edges with eight equivalent EuS12 cuboctahedra, edges with eight equivalent SEu4S8 cuboctahedra, faces with four equivalent EuS12 cuboctahedra, and faces with ten equivalent SEu4S8 cuboctahedra. There are four shorter (2.77 Å) and four longer (3.20 Å) S–S bond lengths. In the second S+0.67- site, S+0.67- is bonded in a square co-planar geometry to four equivalent Eu2+ and eight equivalent S+0.67- atoms.