Pr(FeO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Pr(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(4), four equivalent O(2), and four equivalent O(3) atoms. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 11-17°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms.
Pr(FeO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Pr(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(4), four equivalent O(2), and four equivalent O(3) atoms. There is one shorter (2.47 Å) and one longer (2.96 Å) Pr(1)-O(1) bond length. There is one shorter (2.57 Å) and one longer (2.88 Å) Pr(1)-O(4) bond length. There are two shorter (2.49 Å) and two longer (3.07 Å) Pr(1)-O(2) bond lengths. There are two shorter (2.59 Å) and two longer (2.73 Å) Pr(1)-O(3) bond lengths. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 11-17°. The Fe(1)-O(1) bond length is 1.93 Å. The Fe(1)-O(4) bond length is 1.94 Å. There is one shorter (1.91 Å) and one longer (1.92 Å) Fe(1)-O(2) bond length. There is one shorter (1.94 Å) and one longer (1.95 Å) Fe(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Pr(1) and two equivalent Fe(1) atoms.