Ba2Mg(MoO4)2 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. Mg(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share  an edgeedge with one Mo(2)O4 tetrahedra and edges with two equivalent Mo(1)O4 tetrahedra. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form MoO4 tetrahedra that share edges with two equivalent Mg(1)O6 octahedra. In the second Mo site, Mo(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form MoO4 tetrahedra that share  an edgeedge with one Mg(1)O6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Mo(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom.
Ba2Mg(MoO4)2 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Ba(1)-O(1) bond length is 2.71 Å. The Ba(1)-O(2) bond length is 2.69 Å. The Ba(1)-O(3) bond length is 2.70 Å. The Ba(1)-O(4) bond length is 2.68 Å. The Ba(1)-O(5) bond length is 3.02 Å. The Ba(1)-O(6) bond length is 3.09 Å. The Ba(1)-O(7) bond length is 2.67 Å. The Ba(1)-O(8) bond length is 2.67 Å. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Ba(2)-O(1) bond length is 3.03 Å. The Ba(2)-O(2) bond length is 3.08 Å. The Ba(2)-O(3) bond length is 2.87 Å. The Ba(2)-O(4) bond length is 2.84 Å. The Ba(2)-O(5) bond length is 2.88 Å. The Ba(2)-O(6) bond length is 2.83 Å. The Ba(2)-O(7) bond length is 2.91 Å. The Ba(2)-O(8) bond length is 2.88 Å. Mg(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share  an edgeedge with one Mo(2)O4 tetrahedra and edges with two equivalent Mo(1)O4 tetrahedra. The Mg(1)-O(1) bond length is 2.22 Å. The Mg(1)-O(2) bond length is 2.31 Å. The Mg(1)-O(5) bond length is 2.06 Å. The Mg(1)-O(6) bond length is 2.05 Å. The Mg(1)-O(7) bond length is 2.17 Å. The Mg(1)-O(8) bond length is 2.14 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form MoO4 tetrahedra that share edges with two equivalent Mg(1)O6 octahedra. The Mo(1)-O(1) bond length is 1.88 Å. The Mo(1)-O(2) bond length is 1.86 Å. The Mo(1)-O(7) bond length is 1.90 Å. The Mo(1)-O(8) bond length is 1.90 Å. In the second Mo site, Mo(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form MoO4 tetrahedra that share  an edgeedge with one Mg(1)O6 octahedra. The Mo(2)-O(3) bond length is 1.84 Å. The Mo(2)-O(4) bond length is 1.84 Å. The Mo(2)-O(5) bond length is 1.92 Å. The Mo(2)-O(6) bond length is 1.92 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Mo(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Mo(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Mo(1) atom.