NaPrS2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Na(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form NaS6 octahedra that share corners with six equivalent Na(1)S6 octahedra, edges with four equivalent Na(1)S6 octahedra, and edges with eight equivalent Pr(1)S6 octahedra. The corner-sharing octahedra are not tilted. Pr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form PrS6 octahedra that share corners with six equivalent Pr(1)S6 octahedra, edges with four equivalent Pr(1)S6 octahedra, and edges with eight equivalent Na(1)S6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Na(1) and four equivalent Pr(1) atoms to form SNa2Pr4 octahedra that share corners with six equivalent S(1)Na2Pr4 octahedra, edges with four equivalent S(1)Na2Pr4 octahedra, and edges with eight equivalent S(2)Na4Pr2 octahedra. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded to four equivalent Na(1) and two equivalent Pr(1) atoms to form SNa4Pr2 octahedra that share corners with six equivalent S(2)Na4Pr2 octahedra, edges with four equivalent S(2)Na4Pr2 octahedra, and edges with eight equivalent S(1)Na2Pr4 octahedra. The corner-sharing octahedra are not tilted.
NaPrS2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Na(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form NaS6 octahedra that share corners with six equivalent Na(1)S6 octahedra, edges with four equivalent Na(1)S6 octahedra, and edges with eight equivalent Pr(1)S6 octahedra. The corner-sharing octahedra are not tilted. Both Na(1)-S(1) bond lengths are 2.82 Å. All Na(1)-S(2) bond lengths are 2.93 Å. Pr(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form PrS6 octahedra that share corners with six equivalent Pr(1)S6 octahedra, edges with four equivalent Pr(1)S6 octahedra, and edges with eight equivalent Na(1)S6 octahedra. The corner-sharing octahedra are not tilted. Both Pr(1)-S(2) bond lengths are 2.82 Å. All Pr(1)-S(1) bond lengths are 2.93 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Na(1) and four equivalent Pr(1) atoms to form SNa2Pr4 octahedra that share corners with six equivalent S(1)Na2Pr4 octahedra, edges with four equivalent S(1)Na2Pr4 octahedra, and edges with eight equivalent S(2)Na4Pr2 octahedra. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded to four equivalent Na(1) and two equivalent Pr(1) atoms to form SNa4Pr2 octahedra that share corners with six equivalent S(2)Na4Pr2 octahedra, edges with four equivalent S(2)Na4Pr2 octahedra, and edges with eight equivalent S(1)Na2Pr4 octahedra. The corner-sharing octahedra are not tilted.