MnH2(SO4)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one O(1) and one O(4) atom. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one H(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mn(1), one H(1), and one S(1) atom.
MnH2(SO4)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. Both Mn(1)-O(2) bond lengths are 2.17 Å. Both Mn(1)-O(3) bond lengths are 2.18 Å. Both Mn(1)-O(4) bond lengths are 2.24 Å. H(1) is bonded in a single-bond geometry to one O(1) and one O(4) atom. The H(1)-O(1) bond length is 1.01 Å. The H(1)-O(4) bond length is 1.73 Å. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. The S(1)-O(1) bond length is 1.58 Å. The S(1)-O(2) bond length is 1.47 Å. The S(1)-O(3) bond length is 1.46 Å. The S(1)-O(4) bond length is 1.48 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one H(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mn(1), one H(1), and one S(1) atom.