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Pr4Sb3 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Pr is bonded in a 6-coordinate geometry to six equivalent Sb atoms. There are three shorter (3.19 Å) and three longer (3.45 Å) Pr–Sb bond lengths. Sb is bonded to eight equivalent Pr atoms to form a mixture of distorted edge, corner, and face-sharing SbPr8 hexagonal bipyramids.
PrSb is Tetraauricupride structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Pr3+ is bonded in a body-centered cubic geometry to eight equivalent Sb3- atoms. All Pr–Sb bond lengths are 3.40 Å. Sb3- is bonded in a body-centered cubic geometry to eight equivalent Pr3+ atoms.
PrSb is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pr3+ is bonded to six equivalent Sb3- atoms to form a mixture of edge and corner-sharing PrSb6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Pr–Sb bond lengths are 3.22 Å. Sb3- is bonded to six equivalent Pr3+ atoms to form a mixture of edge and corner-sharing SbPr6 octahedra. The corner-sharing octahedral tilt angles are 0°.
PrSb2 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Pr3+ is bonded in a 9-coordinate geometry to nine Sb+1.50- atoms. There are a spread of Pr–Sb bond distances ranging from 3.21–3.50 Å. There are two inequivalent Sb+1.50- sites. In the first Sb+1.50- site, Sb+1.50- is bonded in a 6-coordinate geometry to five equivalent Pr3+ and one Sb+1.50- atom. The Sb–Sb bond length is 2.85 Å. In the second Sb+1.50- site, Sb+1.50- is bonded in a 8-coordinate geometry to four equivalent Pr3+ and four equivalent Sb+1.50- atoms. There are two shorter (3.11 Å) and two longer (3.18 Å) Sb–Sb bond lengths.
Pr2Sb crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Pr sites. In the first Pr site, Pr is bonded in a 4-coordinate geometry to four equivalent Sb atoms. All Pr–Sb bond lengths are 3.39 Å. In the second Pr site, Pr is bonded to five equivalent Sb atoms to form a mixture of distorted edge and corner-sharing PrSb5 trigonal bipyramids. There are one shorter (3.27 Å) and four longer (3.35 Å) Pr–Sb bond lengths. Sb is bonded in a 9-coordinate geometry to nine Pr atoms.