Mn3H2Se3O10 crystallizes in the triclinic P-1 space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(3), one O(5), one O(7), and two equivalent O(6) atoms to form a mixture of distorted corner and edge-sharing MnO6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 47-68°. In the second Mn site, Mn(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the third Mn site, Mn(3) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(10) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(10), one O(8), and one O(9) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mn(4), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(2) and one Se(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one Se(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mn(4) and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mn(1), one Mn(3), and one Se(3) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mn(4), two equivalent Mn(1), and one Se(3) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Se(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(3), one Mn(4), and one Se(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(2), one Mn(4), and one Se(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one H(1), and one Se(2) atom.
Mn3H2Se3O10 crystallizes in the triclinic P-1 space group. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(3), one O(5), one O(7), and two equivalent O(6) atoms to form a mixture of distorted corner and edge-sharing MnO6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 47-68°. The Mn(1)-O(10) bond length is 2.10 Å. The Mn(1)-O(3) bond length is 2.14 Å. The Mn(1)-O(5) bond length is 2.24 Å. The Mn(1)-O(7) bond length is 2.21 Å. There is one shorter (2.41 Å) and one longer (2.47 Å) Mn(1)-O(6) bond length. In the second Mn site, Mn(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. Both Mn(2)-O(2) bond lengths are 2.14 Å. Both Mn(2)-O(7) bond lengths are 2.31 Å. Both Mn(2)-O(9) bond lengths are 2.16 Å. In the third Mn site, Mn(3) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(8) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. Both Mn(3)-O(3) bond lengths are 2.17 Å. Both Mn(3)-O(5) bond lengths are 2.26 Å. Both Mn(3)-O(8) bond lengths are 2.21 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. The Mn(4)-O(1) bond length is 2.23 Å. The Mn(4)-O(6) bond length is 2.22 Å. The Mn(4)-O(8) bond length is 2.28 Å. The Mn(4)-O(9) bond length is 2.21 Å. There is one shorter (2.19 Å) and one longer (2.23 Å) Mn(4)-O(4) bond length. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(10) atom. The H(1)-O(1) bond length is 1.00 Å. The H(1)-O(10) bond length is 1.71 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.98 Å. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. The Se(1)-O(2) bond length is 1.69 Å. The Se(1)-O(3) bond length is 1.75 Å. The Se(1)-O(4) bond length is 1.75 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(10), one O(8), and one O(9) atom. The Se(2)-O(10) bond length is 1.73 Å. The Se(2)-O(8) bond length is 1.74 Å. The Se(2)-O(9) bond length is 1.75 Å. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. The Se(3)-O(5) bond length is 1.72 Å. The Se(3)-O(6) bond length is 1.77 Å. The Se(3)-O(7) bond length is 1.73 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mn(4), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(2) and one Se(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(3), and one Se(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Mn(4) and one Se(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mn(1), one Mn(3), and one Se(3) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mn(4), two equivalent Mn(1), and one Se(3) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mn(1), one Mn(2), and one Se(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(3), one Mn(4), and one Se(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(2), one Mn(4), and one Se(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one H(1), and one Se(2) atom.