Mn2OBO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. In the second Mn site, Mn(2) is bonded to one O(4), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. B(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1) and three equivalent Mn(2) atoms to form a mixture of distorted corner and edge-sharing OMn4 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one B(1) atom.
Mn2OBO3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. The Mn(1)-O(1) bond length is 2.05 Å. The Mn(1)-O(3) bond length is 2.17 Å. There is one shorter (2.06 Å) and one longer (2.08 Å) Mn(1)-O(2) bond length. There is one shorter (2.19 Å) and one longer (2.37 Å) Mn(1)-O(4) bond length. In the second Mn site, Mn(2) is bonded to one O(4), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles range from 53-67°. The Mn(2)-O(4) bond length is 2.01 Å. There is one shorter (2.03 Å) and one longer (2.38 Å) Mn(2)-O(3) bond length. There are a spread of Mn(2)-O(1) bond distances ranging from 1.93-2.25 Å. B(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. The B(1)-O(2) bond length is 1.36 Å. The B(1)-O(3) bond length is 1.39 Å. The B(1)-O(4) bond length is 1.39 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mn(1) and three equivalent Mn(2) atoms to form a mixture of distorted corner and edge-sharing OMn4 tetrahedra. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one B(1) atom.