Gd2Mo(SeO4)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(6), one O(8), two equivalent O(12), and two equivalent O(9) atoms. In the second Gd site, Gd(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(4), one O(5), and one O(8) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(11), one O(12), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(1), one O(6), and one O(9) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(10), one O(2), and one O(7) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Gd(1), one Mo(1), and one Se(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Gd(2), one Mo(1), and one Se(3) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Gd(2) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Gd(2) and one Mo(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Gd(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Gd(1), one Gd(2), and one Se(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Gd(2) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Gd(1) and one Mo(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Gd(1) and one Se(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(2), and one Se(3) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Gd(2), one Mo(1), and one Se(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Gd(1) and one Se(1) atom.
Gd2Mo(SeO4)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(6), one O(8), two equivalent O(12), and two equivalent O(9) atoms. The Gd(1)-O(1) bond length is 2.47 Å. The Gd(1)-O(10) bond length is 2.37 Å. The Gd(1)-O(6) bond length is 2.52 Å. The Gd(1)-O(8) bond length is 2.39 Å. There is one shorter (2.37 Å) and one longer (2.50 Å) Gd(1)-O(12) bond length. There is one shorter (2.42 Å) and one longer (2.44 Å) Gd(1)-O(9) bond length. In the second Gd site, Gd(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. The Gd(2)-O(10) bond length is 2.51 Å. The Gd(2)-O(11) bond length is 2.46 Å. The Gd(2)-O(2) bond length is 2.52 Å. The Gd(2)-O(3) bond length is 2.36 Å. The Gd(2)-O(4) bond length is 2.35 Å. The Gd(2)-O(5) bond length is 2.39 Å. The Gd(2)-O(6) bond length is 2.41 Å. The Gd(2)-O(7) bond length is 2.44 Å. Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(4), one O(5), and one O(8) atom. The Mo(1)-O(1) bond length is 2.38 Å. The Mo(1)-O(11) bond length is 2.19 Å. The Mo(1)-O(2) bond length is 2.12 Å. The Mo(1)-O(4) bond length is 1.77 Å. The Mo(1)-O(5) bond length is 1.80 Å. The Mo(1)-O(8) bond length is 1.79 Å. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(11), one O(12), and one O(3) atom. The Se(1)-O(11) bond length is 1.78 Å. The Se(1)-O(12) bond length is 1.78 Å. The Se(1)-O(3) bond length is 1.70 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(1), one O(6), and one O(9) atom. The Se(2)-O(1) bond length is 1.75 Å. The Se(2)-O(6) bond length is 1.76 Å. The Se(2)-O(9) bond length is 1.75 Å. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(10), one O(2), and one O(7) atom. The Se(3)-O(10) bond length is 1.75 Å. The Se(3)-O(2) bond length is 1.80 Å. The Se(3)-O(7) bond length is 1.70 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Gd(1), one Mo(1), and one Se(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Gd(2), one Mo(1), and one Se(3) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Gd(2) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted linear geometry to one Gd(2) and one Mo(1) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Gd(2) and one Mo(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Gd(1), one Gd(2), and one Se(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Gd(2) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Gd(1) and one Mo(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Gd(1) and one Se(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(2), and one Se(3) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Gd(2), one Mo(1), and one Se(1) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to two equivalent Gd(1) and one Se(1) atom.