PrF3 crystallizes in the hexagonal P6_322 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms. In the second Pr site, Pr(1) is bonded in a 12-coordinate geometry to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded to four Pr(1,1) atoms to form distorted FPr4 tetrahedra that share corners with three equivalent F(3)Pr6 octahedra, corners with nineteen equivalent F(1)Pr4 tetrahedra,  an edgeedge with one F(3)Pr6 octahedra, edges with three equivalent F(1)Pr4 tetrahedra,  a faceface with one F(3)Pr6 octahedra, and  a faceface with one F(1)Pr4 tetrahedra. The corner-sharing octahedral tilt angles range from 10-64°. In the second F site, F(2) is bonded in a trigonal planar geometry to three equivalent Pr(1) atoms. In the third F site, F(3) is bonded to six Pr(1,1) atoms to form FPr6 octahedra that share corners with eighteen equivalent F(1)Pr4 tetrahedra, edges with six equivalent F(1)Pr4 tetrahedra, faces with two equivalent F(3)Pr6 octahedra, and faces with six equivalent F(1)Pr4 tetrahedra.
PrF3 crystallizes in the hexagonal P6_322 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms. Both Pr(1)-F(2) bond lengths are 2.40 Å. Both Pr(1)-F(3) bond lengths are 2.96 Å. There are a spread of Pr(1)-F(1) bond distances ranging from 2.39-2.74 Å. In the second Pr site, Pr(1) is bonded in a 12-coordinate geometry to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms. Both Pr(1)-F(2) bond lengths are 2.40 Å. Both Pr(1)-F(3) bond lengths are 2.96 Å. There are a spread of Pr(1)-F(1) bond distances ranging from 2.39-2.74 Å. There are three inequivalent F sites. In the first F site, F(1) is bonded to four Pr(1,1) atoms to form distorted FPr4 tetrahedra that share corners with three equivalent F(3)Pr6 octahedra, corners with nineteen equivalent F(1)Pr4 tetrahedra,  an edgeedge with one F(3)Pr6 octahedra, edges with three equivalent F(1)Pr4 tetrahedra,  a faceface with one F(3)Pr6 octahedra, and  a faceface with one F(1)Pr4 tetrahedra. The corner-sharing octahedral tilt angles range from 10-64°. In the second F site, F(2) is bonded in a trigonal planar geometry to three equivalent Pr(1) atoms. In the third F site, F(3) is bonded to six Pr(1,1) atoms to form FPr6 octahedra that share corners with eighteen equivalent F(1)Pr4 tetrahedra, edges with six equivalent F(1)Pr4 tetrahedra, faces with two equivalent F(3)Pr6 octahedra, and faces with six equivalent F(1)Pr4 tetrahedra.