NaMgCr2In(H2O5)2 crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 4-coordinate geometry to one O(3), one O(5), and two equivalent O(8) atoms. Mg(1) is bonded to one O(4), one O(6), and two equivalent O(7) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent Cr(1)O4 tetrahedra,  an edgeedge with one In(1)O6 octahedra, and  an edgeedge with one Cr(2)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(3), one O(5), and two equivalent O(7) atoms to form CrO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. In the second Cr site, Cr(2) is bonded to one O(4), one O(6), and two equivalent O(8) atoms to form CrO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. In(1) is bonded to one O(1), one O(2), two equivalent O(7), and two equivalent O(8) atoms to form InO6 octahedra that share corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(5) atom. In the third H site, H(3) is bonded in a linear geometry to one O(1) and one O(4) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(2) and one O(3) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one In(1), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one In(1), one H(2), and one H(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one H(4) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Cr(2), and one H(3) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one H(2) atom. In the sixth O site, O(6) is bonded in an L-shaped geometry to one Mg(1) and one Cr(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cr(1), and one In(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Cr(2), and one In(1) atom.
NaMgCr2In(H2O5)2 crystallizes in the monoclinic Cm space group. Na(1) is bonded in a 4-coordinate geometry to one O(3), one O(5), and two equivalent O(8) atoms. The Na(1)-O(3) bond length is 2.36 Å. The Na(1)-O(5) bond length is 2.55 Å. Both Na(1)-O(8) bond lengths are 2.43 Å. Mg(1) is bonded to one O(4), one O(6), and two equivalent O(7) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent Cr(1)O4 tetrahedra,  an edgeedge with one In(1)O6 octahedra, and  an edgeedge with one Cr(2)O4 tetrahedra. The Mg(1)-O(4) bond length is 1.99 Å. The Mg(1)-O(6) bond length is 2.03 Å. Both Mg(1)-O(7) bond lengths are 2.03 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(3), one O(5), and two equivalent O(7) atoms to form CrO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. The Cr(1)-O(3) bond length is 1.66 Å. The Cr(1)-O(5) bond length is 1.67 Å. Both Cr(1)-O(7) bond lengths are 1.81 Å. In the second Cr site, Cr(2) is bonded to one O(4), one O(6), and two equivalent O(8) atoms to form CrO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. The Cr(2)-O(4) bond length is 1.75 Å. The Cr(2)-O(6) bond length is 1.75 Å. Both Cr(2)-O(8) bond lengths are 1.72 Å. In(1) is bonded to one O(1), one O(2), two equivalent O(7), and two equivalent O(8) atoms to form InO6 octahedra that share corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The In(1)-O(1) bond length is 2.21 Å. The In(1)-O(2) bond length is 2.17 Å. Both In(1)-O(7) bond lengths are 2.21 Å. Both In(1)-O(8) bond lengths are 2.17 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(2) and one O(5) atom. The H(2)-O(2) bond length is 1.00 Å. The H(2)-O(5) bond length is 1.64 Å. In the third H site, H(3) is bonded in a linear geometry to one O(1) and one O(4) atom. The H(3)-O(1) bond length is 1.03 Å. The H(3)-O(4) bond length is 1.55 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(2) and one O(3) atom. The H(4)-O(2) bond length is 1.01 Å. The H(4)-O(3) bond length is 1.54 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one In(1), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one In(1), one H(2), and one H(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one H(4) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Cr(2), and one H(3) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Cr(1), and one H(2) atom. In the sixth O site, O(6) is bonded in an L-shaped geometry to one Mg(1) and one Cr(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cr(1), and one In(1) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one Cr(2), and one In(1) atom.