PrZn(SnO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. Zn(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with four equivalent Sn(1)O6 octahedra and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 62-66°. Sn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted SnO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra, corners with two equivalent Zn(1)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 33-48°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Pr(1), one Zn(1), and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OPrZnSn2 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Pr(1) and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Pr(1), one Zn(1), and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Pr(1), one Zn(1), and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OPrZnSn2 trigonal pyramids.
PrZn(SnO3)2 crystallizes in the orthorhombic Pmn2_1 space group. Pr(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. The Pr(1)-O(1) bond length is 2.39 Å. The Pr(1)-O(4) bond length is 2.53 Å. Both Pr(1)-O(2) bond lengths are 2.37 Å. There are two shorter (2.58 Å) and two longer (2.93 Å) Pr(1)-O(3) bond lengths. Zn(1) is bonded to one O(1), one O(4), and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with four equivalent Sn(1)O6 octahedra and edges with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 62-66°. The Zn(1)-O(1) bond length is 2.29 Å. The Zn(1)-O(4) bond length is 1.98 Å. Both Zn(1)-O(3) bond lengths are 2.02 Å. Sn(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted SnO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra, corners with two equivalent Zn(1)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 33-48°. The Sn(1)-O(1) bond length is 2.18 Å. The Sn(1)-O(4) bond length is 2.19 Å. There is one shorter (2.07 Å) and one longer (2.11 Å) Sn(1)-O(2) bond length. There is one shorter (2.21 Å) and one longer (2.44 Å) Sn(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Pr(1), one Zn(1), and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OPrZnSn2 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Pr(1) and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Pr(1), one Zn(1), and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded to one Pr(1), one Zn(1), and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OPrZnSn2 trigonal pyramids.