K2MgSm2(MoO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one Mg(1), one O(13), one O(14), one O(15), one O(16), one O(2), one O(4), one O(5), and one O(7) atom. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(11), one O(13), one O(15), one O(2), one O(3), one O(4), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded in a rectangular see-saw-like geometry to one K(1), one O(1), one O(10), one O(12), and one O(3) atom. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(11), one O(13), one O(15), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Mo sites. In the first Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. In the second Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. In the third Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. In the fourth Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), one Mg(1), one Mo(1), and one Mo(4) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mo(2), and one Mo(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(2), one Mg(1), one Mo(2), and one Mo(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mo(1), and one Mo(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Sm(1), one Sm(2), and one Mo(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(2), one Sm(1), one Sm(2), and one Mo(4) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Sm(1), one Sm(2), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(2), one Sm(1), one Sm(2), and one Mo(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one Sm(1), one Mo(1), and one Mo(2) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(2), one Mo(1), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one K(2), one Sm(1), one Mo(3), and one Mo(4) atom. In the twelfth O site, O(12) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(2), one Mo(3), and one Mo(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Sm(1), and one Mo(1) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(1), one Sm(2), and one Mo(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Sm(1), and one Mo(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one K(1), one Sm(2), and one Mo(4) atom.
K2MgSm2(MoO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one Mg(1), one O(13), one O(14), one O(15), one O(16), one O(2), one O(4), one O(5), and one O(7) atom. The K(1)-Mg(1) bond length is 2.91 Å. The K(1)-O(13) bond length is 2.77 Å. The K(1)-O(14) bond length is 2.62 Å. The K(1)-O(15) bond length is 2.77 Å. The K(1)-O(16) bond length is 2.61 Å. The K(1)-O(2) bond length is 2.71 Å. The K(1)-O(4) bond length is 2.71 Å. The K(1)-O(5) bond length is 3.17 Å. The K(1)-O(7) bond length is 3.18 Å. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(1), one O(11), one O(13), one O(15), one O(2), one O(3), one O(4), one O(6), one O(8), and one O(9) atom. The K(2)-O(1) bond length is 2.85 Å. The K(2)-O(11) bond length is 3.11 Å. The K(2)-O(13) bond length is 2.96 Å. The K(2)-O(15) bond length is 2.97 Å. The K(2)-O(2) bond length is 3.00 Å. The K(2)-O(3) bond length is 2.85 Å. The K(2)-O(4) bond length is 2.98 Å. The K(2)-O(6) bond length is 3.19 Å. The K(2)-O(8) bond length is 3.20 Å. The K(2)-O(9) bond length is 3.13 Å. Mg(1) is bonded in a rectangular see-saw-like geometry to one K(1), one O(1), one O(10), one O(12), and one O(3) atom. The Mg(1)-O(1) bond length is 1.91 Å. The Mg(1)-O(10) bond length is 2.03 Å. The Mg(1)-O(12) bond length is 2.03 Å. The Mg(1)-O(3) bond length is 1.92 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(11), one O(13), one O(15), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The Sm(1)-O(11) bond length is 2.35 Å. The Sm(1)-O(13) bond length is 2.34 Å. The Sm(1)-O(15) bond length is 2.33 Å. The Sm(1)-O(5) bond length is 2.86 Å. The Sm(1)-O(6) bond length is 2.45 Å. The Sm(1)-O(7) bond length is 2.79 Å. The Sm(1)-O(8) bond length is 2.46 Å. The Sm(1)-O(9) bond length is 2.35 Å. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(14), one O(16), one O(5), one O(6), one O(7), and one O(8) atom. The Sm(2)-O(10) bond length is 2.36 Å. The Sm(2)-O(12) bond length is 2.37 Å. The Sm(2)-O(14) bond length is 2.41 Å. The Sm(2)-O(16) bond length is 2.41 Å. The Sm(2)-O(5) bond length is 2.44 Å. The Sm(2)-O(6) bond length is 2.88 Å. The Sm(2)-O(7) bond length is 2.45 Å. The Sm(2)-O(8) bond length is 2.80 Å. There are four inequivalent Mo sites. In the first Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. The Mo(1)-O(1) bond length is 2.04 Å. The Mo(1)-O(10) bond length is 2.14 Å. The Mo(1)-O(13) bond length is 1.84 Å. The Mo(1)-O(4) bond length is 2.09 Å. The Mo(1)-O(7) bond length is 1.85 Å. The Mo(1)-O(9) bond length is 2.22 Å. In the second Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. The Mo(2)-O(10) bond length is 2.28 Å. The Mo(2)-O(14) bond length is 1.81 Å. The Mo(2)-O(2) bond length is 1.88 Å. The Mo(2)-O(3) bond length is 2.11 Å. The Mo(2)-O(8) bond length is 1.85 Å. The Mo(2)-O(9) bond length is 1.97 Å. In the third Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. The Mo(3)-O(11) bond length is 2.22 Å. The Mo(3)-O(12) bond length is 2.15 Å. The Mo(3)-O(15) bond length is 1.85 Å. The Mo(3)-O(2) bond length is 2.09 Å. The Mo(3)-O(3) bond length is 2.05 Å. The Mo(3)-O(5) bond length is 1.84 Å. In the fourth Mo site, Mo(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 distorted edge and corner-sharing MoO6 octahedra. The corner-sharing octahedral tilt angles range from 38-45°. The Mo(4)-O(1) bond length is 2.11 Å. The Mo(4)-O(11) bond length is 1.97 Å. The Mo(4)-O(12) bond length is 2.28 Å. The Mo(4)-O(16) bond length is 1.81 Å. The Mo(4)-O(4) bond length is 1.88 Å. The Mo(4)-O(6) bond length is 1.85 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one K(2), one Mg(1), one Mo(1), and one Mo(4) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mo(2), and one Mo(3) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one K(2), one Mg(1), one Mo(2), and one Mo(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Mo(1), and one Mo(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Sm(1), one Sm(2), and one Mo(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(2), one Sm(1), one Sm(2), and one Mo(4) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Sm(1), one Sm(2), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(2), one Sm(1), one Sm(2), and one Mo(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one K(2), one Sm(1), one Mo(1), and one Mo(2) atom. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(2), one Mo(1), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one K(2), one Sm(1), one Mo(3), and one Mo(4) atom. In the twelfth O site, O(12) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(2), one Mo(3), and one Mo(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Sm(1), and one Mo(1) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one K(1), one Sm(2), and one Mo(2) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Sm(1), and one Mo(3) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one K(1), one Sm(2), and one Mo(4) atom.