MnH6(SO4)4 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(5) atoms to form MnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with four equivalent S(2)O4 tetrahedra. There are three inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(8) atom. In the second H site, H(2) is bonded in a linear geometry to one O(1) and one O(7) atom. In the third H site, H(3) is bonded in a distorted linear geometry to one O(4) and one O(6) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 35°. In the second S site, S(2) 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 two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-39°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to one H(3) and one S(2) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one H(3) and one S(1) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one H(2) and one S(1) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one H(1) and one S(1) atom. In the sixth O site, O(1) is bonded in a trigonal planar geometry to one H(1), one H(2), and one S(2) atom. In the seventh O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(2) atom.
MnH6(SO4)4 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(5) atoms to form MnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with four equivalent S(2)O4 tetrahedra. Both Mn(1)-O(2) bond lengths are 2.15 Å. Both Mn(1)-O(3) bond lengths are 2.21 Å. Both Mn(1)-O(5) bond lengths are 2.21 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(8) atom. The H(1)-O(1) bond length is 1.58 Å. The H(1)-O(8) bond length is 1.03 Å. In the second H site, H(2) is bonded in a linear geometry to one O(1) and one O(7) atom. The H(2)-O(1) bond length is 1.55 Å. The H(2)-O(7) bond length is 1.03 Å. In the third H site, H(3) is bonded in a distorted linear geometry to one O(4) and one O(6) atom. The H(3)-O(4) bond length is 1.01 Å. The H(3)-O(6) bond length is 1.63 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 35°. The S(1)-O(5) bond length is 1.45 Å. The S(1)-O(6) bond length is 1.45 Å. The S(1)-O(7) bond length is 1.55 Å. The S(1)-O(8) bond length is 1.55 Å. In the second S site, S(2) 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 two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-39°. The S(2)-O(1) bond length is 1.49 Å. The S(2)-O(2) bond length is 1.46 Å. The S(2)-O(3) bond length is 1.46 Å. The S(2)-O(4) bond length is 1.57 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to one H(3) and one S(2) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(1) atom. In the third O site, O(6) is bonded in a bent 120 degrees geometry to one H(3) and one S(1) atom. In the fourth O site, O(7) is bonded in a bent 120 degrees geometry to one H(2) and one S(1) atom. In the fifth O site, O(8) is bonded in a bent 120 degrees geometry to one H(1) and one S(1) atom. In the sixth O site, O(1) is bonded in a trigonal planar geometry to one H(1), one H(2), and one S(2) atom. In the seventh O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one S(2) atom.