MnTa2O6 is Hydrophilite-derived structured and crystallizes in the tetragonal P4_2/mnm space group. Ta(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-54°. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with eight equivalent Ta(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom.
MnTa2O6 is Hydrophilite-derived structured and crystallizes in the tetragonal P4_2/mnm space group. Ta(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-54°. Both Ta(1)-O(1) bond lengths are 2.00 Å. All Ta(1)-O(2) bond lengths are 1.99 Å. Mn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form MnO6 octahedra that share corners with eight equivalent Ta(1)O6 octahedra and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. Both Mn(1)-O(1) bond lengths are 2.12 Å. All Mn(1)-O(2) bond lengths are 2.18 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom.