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SrS is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr2+ is bonded in a body-centered cubic geometry to eight equivalent S2- atoms. All Sr–S bond lengths are 3.18 Å. S2- is bonded in a body-centered cubic geometry to eight equivalent Sr2+ atoms.
SrS is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Sr2+ is bonded to six equivalent S2- atoms to form a mixture of corner and edge-sharing SrS6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Sr–S bond lengths are 3.03 Å. S2- is bonded to six equivalent Sr2+ atoms to form a mixture of corner and edge-sharing SSr6 octahedra. The corner-sharing octahedral tilt angles are 0°.
SrS3 crystallizes in the orthorhombic Aea2 space group. The structure is three-dimensional. Sr2+ is bonded in a 9-coordinate geometry to nine S+0.67- atoms. There are a spread of Sr–S bond distances ranging from 3.02–3.51 Å. There are two inequivalent S+0.67- sites. In the first S+0.67- site, S+0.67- is bonded in a 3-coordinate geometry to three equivalent Sr2+ and two equivalent S+0.67- atoms. Both S–S bond lengths are 2.09 Å. In the second S+0.67- site, S+0.67- is bonded to three equivalent Sr2+ and one S+0.67- atom to form a mixture of distorted corner and edge-sharing SSr3S trigonal pyramids.
SrS2 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Sr2+ is bonded in a 8-coordinate geometry to eight equivalent S1- atoms. All Sr–S bond lengths are 3.11 Å. S1- is bonded in a 5-coordinate geometry to four equivalent Sr2+ and one S1- atom. The S–S bond length is 2.12 Å.