K2MgMo2(H2O5)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent Mo(1)O4 tetrahedra. Mo(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MoO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-47°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Mo(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Mg(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mg(1), and one Mo(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1), one Mg(1), one H(1), and one H(2) atom.
K2MgMo2(H2O5)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms. The K(1)-O(2) bond length is 2.87 Å. The K(1)-O(3) bond length is 2.96 Å. The K(1)-O(5) bond length is 2.82 Å. Both K(1)-O(1) bond lengths are 2.75 Å. There is one shorter (2.82 Å) and one longer (3.01 Å) K(1)-O(4) bond length. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent Mo(1)O4 tetrahedra. Both Mg(1)-O(3) bond lengths are 2.13 Å. Both Mg(1)-O(4) bond lengths are 2.14 Å. Both Mg(1)-O(5) bond lengths are 2.10 Å. Mo(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MoO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-47°. The Mo(1)-O(1) bond length is 1.76 Å. The Mo(1)-O(2) bond length is 1.80 Å. The Mo(1)-O(3) bond length is 1.82 Å. The Mo(1)-O(4) bond length is 1.82 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. The H(1)-O(5) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.99 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Mo(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Mo(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Mg(1), and one Mo(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mg(1), and one Mo(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1), one Mg(1), one H(1), and one H(2) atom.