Pr3(ReO5)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Re(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing ReO6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Re(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Pr(1) and two equivalent Re(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to two equivalent Pr(2) and one Re(1) atom. In the fourth O site, O(4) is bonded to one Pr(1), two equivalent Pr(2), and one Re(1) atom to form a mixture of corner and edge-sharing OPr3Re tetrahedra.
Pr3(ReO5)2 crystallizes in the monoclinic C2/m space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(1) atoms. Both Pr(1)-O(2) bond lengths are 2.53 Å. Both Pr(1)-O(4) bond lengths are 2.41 Å. All Pr(1)-O(1) bond lengths are 2.49 Å. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), and four equivalent O(1) atoms. Both Pr(2)-O(3) bond lengths are 2.38 Å. Both Pr(2)-O(4) bond lengths are 2.44 Å. There are two shorter (2.66 Å) and two longer (2.72 Å) Pr(2)-O(1) bond lengths. Re(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing ReO6 octahedra. The Re(1)-O(3) bond length is 2.01 Å. The Re(1)-O(4) bond length is 1.94 Å. Both Re(1)-O(1) bond lengths are 1.88 Å. There is one shorter (1.99 Å) and one longer (2.05 Å) Re(1)-O(2) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Re(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Pr(1) and two equivalent Re(1) atoms. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to two equivalent Pr(2) and one Re(1) atom. In the fourth O site, O(4) is bonded to one Pr(1), two equivalent Pr(2), and one Re(1) atom to form a mixture of corner and edge-sharing OPr3Re tetrahedra.