Mn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Se(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom.
Mn(SeO3)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Mn(1)-O(1) bond lengths are 1.89 Å. Both Mn(1)-O(2) bond lengths are 1.90 Å. Both Mn(1)-O(3) bond lengths are 1.89 Å. Se(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. The Se(1)-O(1) bond length is 1.72 Å. The Se(1)-O(2) bond length is 1.72 Å. The Se(1)-O(3) bond length is 1.74 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one Se(1) atom.