MnH2(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Se(1)O4 tetrahedra and corners with three equivalent Se(2)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(8) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-52°. In the second Se site, Se(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to one H(1) and one Se(1) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(1) and one Se(2) atom. In the third O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(1) and one Se(2) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one Se(2) atom. In the fifth O site, O(8) is bonded in a water-like geometry to one H(2) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1), one H(2), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom.
MnH2(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share corners with three equivalent Se(1)O4 tetrahedra and corners with three equivalent Se(2)O4 tetrahedra. The Mn(1)-O(1) bond length is 2.23 Å. The Mn(1)-O(2) bond length is 2.20 Å. The Mn(1)-O(3) bond length is 2.20 Å. The Mn(1)-O(5) bond length is 2.16 Å. The Mn(1)-O(6) bond length is 2.18 Å. The Mn(1)-O(7) bond length is 2.23 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 1.00 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(1) and one O(8) atom. The H(2)-O(1) bond length is 1.69 Å. The H(2)-O(8) bond length is 1.01 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-52°. The Se(1)-O(1) bond length is 1.68 Å. The Se(1)-O(2) bond length is 1.64 Å. The Se(1)-O(3) bond length is 1.65 Å. The Se(1)-O(4) bond length is 1.76 Å. In the second Se site, Se(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SeO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-46°. The Se(2)-O(5) bond length is 1.65 Å. The Se(2)-O(6) bond length is 1.65 Å. The Se(2)-O(7) bond length is 1.68 Å. The Se(2)-O(8) bond length is 1.76 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to one H(1) and one Se(1) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(1) and one Se(2) atom. In the third O site, O(6) is bonded in a bent 150 degrees geometry to one Mn(1) and one Se(2) atom. In the fourth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one Se(2) atom. In the fifth O site, O(8) is bonded in a water-like geometry to one H(2) and one Se(2) atom. In the sixth O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(1), one H(2), and one Se(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one Se(1) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom.