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PrS2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Pr4+ is bonded in a 12-coordinate geometry to twelve equivalent S2- atoms. All Pr–S bond lengths are 3.30 Å. S2- is bonded to six equivalent Pr4+ and six equivalent S2- atoms to form a mixture of face, edge, and corner-sharing SPr6S6 cuboctahedra. All S–S bond lengths are 2.81 Å.
Pr3S4 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Pr is bonded to eight equivalent S atoms to form a mixture of distorted face, edge, and corner-sharing PrS8 hexagonal bipyramids. There are four shorter (2.92 Å) and four longer (3.07 Å) Pr–S bond lengths. S is bonded to six equivalent Pr atoms to form a mixture of distorted face, edge, and corner-sharing SPr6 octahedra. The corner-sharing octahedra tilt angles range from 17–50°.
Pr2S3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Pr3+ sites. In the first Pr3+ site, Pr3+ is bonded to seven S2- atoms to form distorted edge-sharing PrS7 pentagonal bipyramids. There are a spread of Pr–S bond distances ranging from 2.86–3.05 Å. In the second Pr3+ site, Pr3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Pr–S bond distances ranging from 2.86–3.14 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to five Pr3+ atoms to form a mixture of distorted face, edge, and corner-sharing SPr5 square pyramids. In the second S2- site, S2- is bonded to five Pr3+ atoms to form a mixture of distorted face, edge, and corner-sharing SPr5 trigonal bipyramids. In the third S2- site, S2- is bonded to five Pr3+ atoms to form a mixture of distorted edge and corner-sharing SPr5 trigonal bipyramids.
PrS2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Pr4+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Pr–S bond distances ranging from 2.88–3.21 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to five equivalent Pr4+ atoms to form a mixture of distorted corner and edge-sharing SPr5 trigonal bipyramids. In the second S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent Pr4+ and one S2- atom. The S–S bond length is 2.12 Å. In the third S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent Pr4+ and one S2- atom.
PrS is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pr is bonded to six equivalent S atoms to form a mixture of edge and corner-sharing PrS6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–S bond lengths are 2.90 Å. S is bonded to six equivalent Pr atoms to form a mixture of edge and corner-sharing SPr6 octahedra. The corner-sharing octahedral tilt angles are 0°.
PrS2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Pr4+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Pr–S bond distances ranging from 2.87–3.20 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded to five equivalent Pr4+ atoms to form a mixture of distorted corner and edge-sharing SPr5 trigonal bipyramids. In the second S2- site, S2- is bonded in a 5-coordinate geometry to four equivalent Pr4+ and one S2- atom. The S–S bond length is 2.15 Å.
Pr10S19 crystallizes in the tetragonal P4_2/n space group. The structure is three-dimensional. there are three inequivalent Pr+3.80+ sites. In the first Pr+3.80+ site, Pr+3.80+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Pr–S bond distances ranging from 2.92–3.01 Å. In the second Pr+3.80+ site, Pr+3.80+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Pr–S bond distances ranging from 2.88–3.14 Å. In the third Pr+3.80+ site, Pr+3.80+ is bonded in a 9-coordinate geometry to nine S2- atoms. There are a spread of Pr–S bond distances ranging from 2.92–3.20 Å. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded to five Pr+3.80+ atoms to form a mixture of distorted edge and corner-sharing SPr5 trigonal bipyramids. In the second S2- site, S2- is bonded to five Pr+3.80+ atoms to form a mixture of distorted edge and corner-sharing SPr5 trigonal bipyramids. In the third S2- site, S2- is bonded in a 5-coordinate geometry to four Pr+3.80+ and one S2- atom. The S–S bond length is 2.16 Å. In the fourth S2- site, S2- is bonded in a 5-coordinate geometry to four Pr+3.80+ and one S2- atom. In the fifth S2- site, S2- is bonded to five Pr+3.80+ atoms to form a mixture of distorted edge and corner-sharing SPr5 trigonal bipyramids. In the sixth S2- site, S2- is bonded in a 4-coordinate geometry to four equivalent Pr+3.80+ atoms.
PrS3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Pr4+ is bonded to twelve equivalent S+1.33- atoms to form a mixture of distorted face and corner-sharing PrS12 cuboctahedra. There are six shorter (2.90 Å) and six longer (3.25 Å) Pr–S bond lengths. S+1.33- is bonded in a 2-coordinate geometry to four equivalent Pr4+ atoms.