Rb2MgPr2(WO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one Mg(1), one O(1), one O(10), one O(12), one O(14), one O(16), one O(2), one O(5), and one O(7) atom. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(15), one O(2), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded in a 4-coordinate geometry to one Rb(1), one O(16), one O(3), one O(4), and one O(8) atom. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to one O(11), one O(13), one O(15), one O(5), one O(6), one O(8), and one O(9) atom. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(5), one O(6), and one O(7) atom. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(10), one O(13), one O(4), one O(7), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-47°. In the second W site, W(2) is bonded to one O(10), one O(14), one O(2), one O(3), one O(8), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. In the third W site, W(3) is bonded to one O(11), one O(12), one O(15), one O(2), one O(3), and one O(5) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(12), one O(16), one O(4), and one O(6) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-47°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(1), and one W(4) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(2), and one W(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one W(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one W(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Rb(1), one Pr(1), one Pr(2), and one W(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Rb(2), one Pr(1), one Pr(2), and one W(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Pr(2), and one W(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one Pr(1), and one W(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Rb(2), one Pr(1), one W(1), and one W(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Rb(1), one Pr(2), one W(1), and one W(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one W(3), and one W(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Rb(1), one Pr(2), one W(3), and one W(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Rb(2), one Pr(1), and one W(1) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Rb(1), one Pr(2), and one W(2) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Rb(2), one Pr(1), and one W(3) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Rb(1), one Mg(1), one Pr(2), and one W(4) atom.
Rb2MgPr2(WO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one Mg(1), one O(1), one O(10), one O(12), one O(14), one O(16), one O(2), one O(5), and one O(7) atom. The Rb(1)-Mg(1) bond length is 3.00 Å. The Rb(1)-O(1) bond length is 2.91 Å. The Rb(1)-O(10) bond length is 3.25 Å. The Rb(1)-O(12) bond length is 3.24 Å. The Rb(1)-O(14) bond length is 2.73 Å. The Rb(1)-O(16) bond length is 3.00 Å. The Rb(1)-O(2) bond length is 2.82 Å. The Rb(1)-O(5) bond length is 3.05 Å. The Rb(1)-O(7) bond length is 3.16 Å. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(13), one O(15), one O(2), one O(6), one O(8), and one O(9) atom. The Rb(2)-O(1) bond length is 2.92 Å. The Rb(2)-O(13) bond length is 2.95 Å. The Rb(2)-O(15) bond length is 2.85 Å. The Rb(2)-O(2) bond length is 3.06 Å. The Rb(2)-O(6) bond length is 2.92 Å. The Rb(2)-O(8) bond length is 3.07 Å. The Rb(2)-O(9) bond length is 3.16 Å. Mg(1) is bonded in a 4-coordinate geometry to one Rb(1), one O(16), one O(3), one O(4), and one O(8) atom. The Mg(1)-O(16) bond length is 2.02 Å. The Mg(1)-O(3) bond length is 2.09 Å. The Mg(1)-O(4) bond length is 2.04 Å. The Mg(1)-O(8) bond length is 1.97 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 7-coordinate geometry to one O(11), one O(13), one O(15), one O(5), one O(6), one O(8), and one O(9) atom. The Pr(1)-O(11) bond length is 2.39 Å. The Pr(1)-O(13) bond length is 2.42 Å. The Pr(1)-O(15) bond length is 2.41 Å. The Pr(1)-O(5) bond length is 2.72 Å. The Pr(1)-O(6) bond length is 2.53 Å. The Pr(1)-O(8) bond length is 2.35 Å. The Pr(1)-O(9) bond length is 2.44 Å. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(5), one O(6), and one O(7) atom. The Pr(2)-O(10) bond length is 2.46 Å. The Pr(2)-O(12) bond length is 2.39 Å. The Pr(2)-O(14) bond length is 2.43 Å. The Pr(2)-O(16) bond length is 2.37 Å. The Pr(2)-O(5) bond length is 2.51 Å. The Pr(2)-O(6) bond length is 2.78 Å. The Pr(2)-O(7) bond length is 2.39 Å. There are four inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(10), one O(13), one O(4), one O(7), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-47°. The W(1)-O(1) bond length is 1.95 Å. The W(1)-O(10) bond length is 2.12 Å. The W(1)-O(13) bond length is 1.85 Å. The W(1)-O(4) bond length is 2.04 Å. The W(1)-O(7) bond length is 1.83 Å. The W(1)-O(9) bond length is 2.06 Å. In the second W site, W(2) is bonded to one O(10), one O(14), one O(2), one O(3), one O(8), and one O(9) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. The W(2)-O(10) bond length is 2.09 Å. The W(2)-O(14) bond length is 1.84 Å. The W(2)-O(2) bond length is 2.04 Å. The W(2)-O(3) bond length is 2.13 Å. The W(2)-O(8) bond length is 2.00 Å. The W(2)-O(9) bond length is 2.09 Å. In the third W site, W(3) is bonded to one O(11), one O(12), one O(15), one O(2), one O(3), and one O(5) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 37-50°. The W(3)-O(11) bond length is 2.14 Å. The W(3)-O(12) bond length is 1.98 Å. The W(3)-O(15) bond length is 1.84 Å. The W(3)-O(2) bond length is 1.96 Å. The W(3)-O(3) bond length is 2.06 Å. The W(3)-O(5) bond length is 1.88 Å. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(12), one O(16), one O(4), and one O(6) atom to form a mixture of edge and corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 35-47°. The W(4)-O(1) bond length is 2.04 Å. The W(4)-O(11) bond length is 2.00 Å. The W(4)-O(12) bond length is 2.14 Å. The W(4)-O(16) bond length is 1.99 Å. The W(4)-O(4) bond length is 2.11 Å. The W(4)-O(6) bond length is 1.87 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(1), and one W(4) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Rb(1), one Rb(2), one W(2), and one W(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one W(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one W(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Rb(1), one Pr(1), one Pr(2), and one W(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Rb(2), one Pr(1), one Pr(2), and one W(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Pr(2), and one W(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one Pr(1), and one W(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Rb(2), one Pr(1), one W(1), and one W(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Rb(1), one Pr(2), one W(1), and one W(2) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal non-coplanar geometry to one Pr(1), one W(3), and one W(4) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Rb(1), one Pr(2), one W(3), and one W(4) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Rb(2), one Pr(1), and one W(1) atom. In the fourteenth O site, O(14) is bonded in a distorted T-shaped geometry to one Rb(1), one Pr(2), and one W(2) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Rb(2), one Pr(1), and one W(3) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Rb(1), one Mg(1), one Pr(2), and one W(4) atom.