MgPr(WO3)2 crystallizes in the monoclinic Pc space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the third O site, O(3) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), one W(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form distorted corner-sharing OPrMgW2 trigonal pyramids.
MgPr(WO3)2 crystallizes in the monoclinic Pc space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Mg(1)-O(1) bond length is 2.21 Å. The Mg(1)-O(2) bond length is 2.56 Å. The Mg(1)-O(3) bond length is 2.54 Å. The Mg(1)-O(4) bond length is 2.20 Å. The Mg(1)-O(5) bond length is 2.17 Å. The Mg(1)-O(6) bond length is 2.11 Å. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms. The Pr(1)-O(1) bond length is 2.33 Å. The Pr(1)-O(2) bond length is 2.34 Å. The Pr(1)-O(3) bond length is 2.36 Å. The Pr(1)-O(6) bond length is 2.42 Å. There is one shorter (2.73 Å) and one longer (2.86 Å) Pr(1)-O(4) bond length. There is one shorter (2.69 Å) and one longer (2.92 Å) Pr(1)-O(5) bond length. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. The W(1)-O(1) bond length is 2.15 Å. The W(1)-O(2) bond length is 2.03 Å. The W(1)-O(3) bond length is 2.02 Å. The W(1)-O(4) bond length is 2.09 Å. The W(1)-O(5) bond length is 2.10 Å. The W(1)-O(6) bond length is 2.18 Å. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. The W(2)-O(1) bond length is 2.19 Å. The W(2)-O(2) bond length is 2.13 Å. The W(2)-O(3) bond length is 2.13 Å. The W(2)-O(4) bond length is 2.20 Å. The W(2)-O(5) bond length is 2.19 Å. The W(2)-O(6) bond length is 2.22 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the third O site, O(3) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form a mixture of distorted corner and edge-sharing OPrMgW2 trigonal pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), one W(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one Pr(1), one W(1), and one W(2) atom to form distorted corner-sharing OPrMgW2 trigonal pyramids.