MgPrS3 is Ilmenite structured and crystallizes in the trigonal R-3 space group. Mg(1) is bonded to six equivalent S(1) atoms to form MgS6 octahedra that share corners with nine equivalent Pr(1)S6 octahedra, edges with three equivalent Mg(1)S6 octahedra, and  a faceface with one Pr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 41-63°. Pr(1) is bonded to six equivalent S(1) atoms to form distorted PrS6 octahedra that share corners with nine equivalent Mg(1)S6 octahedra, edges with three equivalent Pr(1)S6 octahedra, and  a faceface with one Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 41-63°. S(1) is bonded in a distorted see-saw-like geometry to two equivalent Mg(1) and two equivalent Pr(1) atoms.
MgPrS3 is Ilmenite structured and crystallizes in the trigonal R-3 space group. Mg(1) is bonded to six equivalent S(1) atoms to form MgS6 octahedra that share corners with nine equivalent Pr(1)S6 octahedra, edges with three equivalent Mg(1)S6 octahedra, and  a faceface with one Pr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 41-63°. There are three shorter (2.57 Å) and three longer (2.66 Å) Mg(1)-S(1) bond lengths. Pr(1) is bonded to six equivalent S(1) atoms to form distorted PrS6 octahedra that share corners with nine equivalent Mg(1)S6 octahedra, edges with three equivalent Pr(1)S6 octahedra, and  a faceface with one Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 41-63°. There are three shorter (2.82 Å) and three longer (2.88 Å) Pr(1)-S(1) bond lengths. S(1) is bonded in a distorted see-saw-like geometry to two equivalent Mg(1) and two equivalent Pr(1) atoms.