MnOOH crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing MnO6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing MnO6 octahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one H(1) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one H(2) atom.
MnOOH crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form edge-sharing MnO6 octahedra. The Mn(1)-O(3) bond length is 2.01 Å. The Mn(1)-O(4) bond length is 2.00 Å. There is one shorter (1.95 Å) and one longer (1.96 Å) Mn(1)-O(1) bond length. There is one shorter (2.26 Å) and one longer (2.28 Å) Mn(1)-O(2) bond length. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form edge-sharing MnO6 octahedra. The Mn(2)-O(1) bond length is 2.00 Å. The Mn(2)-O(2) bond length is 1.99 Å. There is one shorter (1.94 Å) and one longer (1.96 Å) Mn(2)-O(3) bond length. There is one shorter (2.24 Å) and one longer (2.31 Å) Mn(2)-O(4) bond length. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. The H(2)-O(4) bond length is 0.98 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mn(2), two equivalent Mn(1), and one H(1) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mn(1), two equivalent Mn(2), and one H(2) atom.